FILE - In this Tuesday, Sept. 25, 2012 file photo, South Korean rapper PSY, who sings the popular "Gangnam Style" song, performs at a university festival in Suwon, south of Seoul, South Korea. The annual holiday concert that President Barack Obama and his family traditionally attend includes a twist this year_ a performance by controversial South Korean rapper and Internet sensation PSY. PSY apologized Friday, Dec. 7, 2012, for using “inflammatory and inappropriate language” during anti-U.S. protests at concerts in 2002 and 2004. (AP Photo/Lee Jin-man, File)

Associated Press
FILE - In this Tuesday, Sept. 25, 2012 file photo, South Korean rapper PSY, who sings the popular "Gangnam Style" song, performs at a university festival in Suwon, south of Seoul, South Korea. The annual holiday concert that President Barack Obama and his family traditionally attend includes a twist this year_ a performance by controversial South Korean rapper and Internet sensation PSY. PSY apologized Friday, Dec. 7, 2012, for using “inflammatory and inappropriate language” during anti-U.S. protests at concerts in 2002 and 2004. (AP Photo/Lee Jin-man, File)
FILE - In this Tuesday, Sept. 25, 2012 file photo, South Korean rapper PSY, who sings the popular "Gangnam Style" song, performs at a university festival in Suwon, south of Seoul, South Korea. The annual holiday concert that President Barack Obama and his family traditionally attend includes a twist this year_ a performance by controversial South Korean rapper and Internet sensation PSY. PSY apologized Friday, Dec. 7, 2012, for using “inflammatory and inappropriate language” during anti-U.S. protests at concerts in 2002 and 2004. (AP Photo/Lee Jin-man, File)
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