Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler, left, and guitarist Joe Perry during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow. (Maximum resolution).

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front guitarist Joe Perry during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108534

Aerosmith front man Steven Tyler, left, and guitarist Joe Perry during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108533

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108532

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108531

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108530

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108529

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108527

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow. (Maximum resolution).

23.05.2017#3108520

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108519

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

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Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108515

Aerosmith front man Steven Tyler during a concert at Olimpiisky Sports Center in Moscow.

23.05.2017#3108514

Aerosmith front man Steven Tyler, left, and guitarist Brad Whitford during a concert at Olimpiisky Sports Center in Moscow. (Maximum resolution).

23.05.2017#3108513

Aerosmith front man Steven Tyler, left, during a concert at Olimpiisky Sports Center in Moscow.

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