Beyonce Knowles performs on stage during the taping of the third to last Oprah Winfrey Show at the United Center in Chicago, Illinois, Tuesday, May 17, 2011. Winfrey is wrapping up production of her wildly popular daytime television program after a 25-year run. AFP PHOTO / Peter Wynn Thompson (Photo credit should read PETER WYNN THOMPSON/AFP via Getty Images)
