Opera singer Nikolai Baskov during his performance in a concert for world opera star Montserrat Caballe in Moscow.

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Opera singers Montserrat Caballe and Montserrat Marti, right, performing at a concert in Moscow.

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Opera singers Montserrat Caballe and Montserrat Marti, right, performing at a concert in Moscow.

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Opera singers Montserrat Caballe and Montserrat Marti, right, performing at a concert in Moscow.

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Opera singers Montserrat Caballe, Montserrat Marti, center, and conductor Ramon Tebar during a performance at a concert in Moscow.

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Opera singers Nikolai Baskov and Montserrat Caballe and Montserrat Marti, right, performing at a concert in Moscow.

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Opera singers Nikolai Baskov and Montserrat Caballe performing at a concert in Moscow.

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Opera singers Montserrat Caballe, Montserrat Marti, and conductor Ramon Tebar, right, during a performance at a concert in Moscow.

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Opera singers Nikolai Baskov and Montserrat Caballe performing at a concert in Moscow.

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Ballerina Anastasia Volochkova, left, before a concert of world opera star Montserrat Caballe in Moscow.

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Former head of the Audit Chamber Sergei Stepashin and his wife before a concert of world opera star Montserrat Caballe in Moscow.

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President of the Russian Banks Association Garegin Tosunian before a concert of world opera star Montserrat Caballe in Moscow.

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General Director of TV channel "Muz-TV" Arman Davletyarov before a concert of world opera star Montserrat Caballe in Moscow.

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The former editor of "Komsomolskaya Pravda" and member of the Public Television Council Gennady Seleznev with his wife before a concert of world opera star Montserrat Caballe in Moscow.

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