Oprah’s O Turns 10!

ET's Kevin Frazier was there as Oprah Winfrey celebrated the 10th anniversary of her popular magazine O, The Oprah Magazine on her live show, broadcast from Radio City Music Hall in New York City!

'When I first started it 10 years ago, that's what I wanted it to be -- a manual for living, for people's lives," Oprah tells Kevin. "I really didn't know anything about a magazine -- Gayle King should be standing here because Gayle gave up her job in television to come and be my editor-at-large. I said I've got to have somebody there who knows my sensibilities."

Dr. Phil, Dr. Oz, Nate Berkus and Suze Orman joined Lady O on stage, and guest Christina Aguilera kicked off the extravaganza by performing her new single "Not Myself Tonight."