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Katy Perry Performs “Firework” At Oprah’s After Oscar Party
March 2, 2011 Katy Perry made a surprise appearance on The Oprah Winfrey Oscar Special on Monday (February 28th). The singer joined the kids of the PS 22 Chorus as they sang her hit, "Firework." Later, Katy and her husband Russell did their first interview together as a married couple.