Opera singer Olga Peretyatko performs at the Opera Ball concert, dedicated to the 75th birthday of People's Artist of the USSR Yelena Obraztsova, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova (left) performs at the Opera Ball concert, dedicated to her 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova performs at the Opera Ball concert, dedicated to her 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova and opera singer Maxim Aksyonov performs at the Opera Ball concert, dedicated to Yelena Obraztsova's 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova performs at the Opera Ball concert, dedicated to her 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova performs at the Opera Ball concert, dedicated to her 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova (center) performs at the Opera Ball concert, dedicated to her 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova (second left) performs at the Opera Ball concert, dedicated to her 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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Opera singer Anna Netrebko performs at the Opera Ball concert, dedicated to the 75th birthday of People's Artist of the USSR Yelena Obraztsova, at the State Academic Bolshoi Theater in Moscow.

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Opera singer Dinara Alieva performs at the Opera Ball concert, dedicated to the 75th birthday of People's Artist of the USSR Yelena Obraztsova, at the State Academic Bolshoi Theater in Moscow.

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Artists perform at the Opera Ball concert, dedicated to the 75th birthday of People's Artist of the USSR Yelena Obraztsova, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova (left), opera singer Dmitry Khvorostovsky, opera singers Dinara Alieva and Yekaterina Syurina (right) perform at the Opera Ball concert, dedicated to Yelena Obraztsova's 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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People's Artist of the USSR Yelena Obraztsova performs at the Opera Ball concert, dedicated to her 75th birthday, at the State Academic Bolshoi Theater in Moscow.

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From left: opera singers Maria Gulegina, People's Artist of the USSR Yelena Obraztsova and Olga Peretyatko at the Opera Ball concert dedicated to Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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From left: opera singers Maria Gulegina, People's Artist of the USSR Yelena Obraztsova, Olga Peretyatko and Yekaterina Syurina at the Opera Ball concert dedicated to Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singers Maria Gulegina, left, and People's Artist of the USSR Yelena Obraztsova at the Opera Ball concert dedicated to Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Jose Cura performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singers Yusif Eivazov and Anna Netrebko perform at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singers Yusif Eivazov and Anna Netrebko perform at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singers Yusif Eivazov and Anna Netrebko perform at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Yusuf Eivazov performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Anna Netrebko performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Olga Peretyatko performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Olga Peretyatko performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Olga Peretyatko performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Bruno Pratico performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Hibla Gerzmava performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singers Bruno Patico and Hibla Gerzmava perform at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Dinara Aliyeva performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Yekaterina Syurina performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Yusif Eivazov performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Flamenco dancer Maria Pages performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Flamenco dancer Maria Pages performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Flamenco dancer Maria Pages performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Flamenco dancer Maria Pages performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Dmitry Khvorostovsky performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Dmitry Khvorostovsky performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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From left: opera singers Dinara Aliyeva, Dmitry Khvorostovsky and Yekaterina Syurina perform at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singers Dmitry Khvorostovsky and Yekaterina Syurina perform at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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People's Artist of the USSR Yelena Obraztsova performs at the Opera Ball concert dedicated to her 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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People's Artist of the USSR Yelena Obraztsova, left, and opera singer MAria Gulegina perform at the Opera Ball concert dedicated to Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Maxim Aksyonov and People's Artist of the USSR Yelena Obraztsova perform at the Opera Ball concert dedicated to her 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Maxim Aksyonov and People's Artist of the USSR Yelena Obraztsova perform at the Opera Ball concert dedicated to her 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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People's Artist of the USSR Yelena Obraztsova performs at the Opera Ball concert dedicated to her 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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People's Artist of the USSR Yelena Obraztsova performs at the Opera Ball concert dedicated to her 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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People's Artist of the USSR Yelena Obraztsova performs at the Opera Ball concert dedicated to her 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Anna Netrebko, left, performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Anna Netrebko performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Anna Netrebko performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Ballet dancer Yulia Makhalina performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Ballet dancer Yulia Makhalina performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Ballet dancer Yulia Makhalina performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Ballet dancer Yulia Makhalina performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Ballet dancer Yulia Makhalina performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Ballet dancer Yulia Makhalina performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Yury Vlasov performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Yury Vlasov performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Yulia Lezhneva performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Yekaterina Syurina performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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Opera singer Dmitry Khvorostovsky performs at the Opera Ball concert dedicated to People's Artist of the USSR Yelena Obraztsova's 75th birthday. The concert took place at the State Academic Bolshoi Theatre in Moscow.

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