During The Oprah Show's 24th season kickoff party, Harpo staff and more than 20,000 people pulled off a massive surprise for an unsuspecting Oprah. The entire crowd performed a choreographed piece to the Black Eyed Peas' "I Gotta Feeling," and Oprah was not only shocked, she was thrilled! Award-winning director Michael Gracey says the interaction between the Black Eyed Peas and the crowd is what made the flash mob so extraordinary.