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Oprah Winfrey

JOHANNESBURG, SOUTH AFRICA - DECOMBER 1: Oprah Winfrey at the graduation ceremony on December 1, 2012, in Johannesburg, South Africa. Oprah came to South Africa for this year's graduation ceremony at the Oprah Winfrey Leadership Academy. (Photo by Gallo Images / Sunday Times / Kevin Sutherland)

Top Shots of the Week

Miss any of this week's most memorable celebrity moments like Katy Perry and Jack Nicholson sharing a smooch, or some TV stars lighting a Christmas tree with the Obamas? Check out omg!'s Top Shots!