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2012 Olympic Games - Closing Ceremony

LONDON, ENGLAND - AUGUST 12: Brian May of Queen performs alongside Jessie J during the Closing Ceremony on Day 16 of the London 2012 Olympic Games at Olympic Stadium on August 12, 2012 in London, England. (Photo by Pascal Le Segretain/Getty Images)

Closing Ceremony performers: Then and now

Check out the Olympic musical performers in their early years and now performing at the Closing Ceremony. -- Tiara Chiaramonte, Yahoo! Sports