"The Russian Children’s Welfare Society (RCWS) invites you to participate in the 46th Annual Petroushka Ball, one of New York’s most vibrant and glamorous Russian-American events, on Friday, February 11, 2011 at the exquisite Waldorf Astoria Grand Ballroom. This year we present to you an exiting entertainment program with a special guests stars Maija Kovalevska, soprano and Piotr Beczała, tenor. They are currently performing the leading roles of Mimi and Rodolfo in La Bohème of the Metropolitan Opera. Followed by musical performance by Lester Lanin Orchestra and Barynya Balalaika Orchestra." [Source]
For more information about entertainers from previous Petroushka Ball events, follow this link.