Alicia Keys and Oprah Winfrey

FILE – This May 17, 2011 file photo shows singer Alicia Keys, left, and Oprah Winfrey during a taping of “Surprise Oprah! A Farewell Spectacular,” in Chicago. Keys announced Tuesday, July 10, 2012 that her organization Keep a Child Alive will pay homage to Winfrey at its Black Ball event on Nov. 1. Winfrey’s humanitarian efforts include the building of schools in South Africa. (AP Photo/Charles Rex Arbogast, file)