NBC

Cher...Cher arrives by police motorcycle for her performance on NBC's "Today" show on Monday, Sept. 23, 2013 in New York. (Photo by Charles Sykes/Invision/AP)

AP/Charles Sykes

Cher, the US singer and actor, arrives by police motorcycle for a performance on NBC’s Today show on Monday. 

South Korean singer Psy performs on NBC's "Today" show at Rockefeller Center in New York

Lucas Jackson/Reuters

South Korean singer Psy performs on NBC’s Today show at Rockefeller Center in New York.