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NEW YORK, NY - APRIL 22: Barbra Streisand attends the 40th Anniversary Chaplin Award Gala at Avery Fisher Hall at Lincoln Center for the Performing Arts on April 22, 2013 in New York City. Jamie McCarthy/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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South Korean rapper Psy, who sings the popular "Gangnam Style" song, performs during his concert in Seoul, South Korea, Tuesday, Oct. 2, 2012. (AP Photo/Ahn Young-joon).
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In this July 23, 2010 photo, singer Katy Perry poses for a portrait in New York. (AP Photo/Victoria Will)