Black Eyed Peas Flash Mob (2009)
In 2008, the Black Eyed Peas kicked off Oprah's 24th season with a concert in Chicago. But to Oprah's surprise, the joke was on her. The massive crowd performed a choreographed dance to "I Gotta Feeling," while Oprah watched in shock and amazement. (AP Photo/Kiichiro Sato, File)
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