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LONDON, UNITED KINGDOM - NOVEMBER 26: (L-R) Taylor Swift, Jon Bon Jovi and Prince William, Duke of Cambridge sing on stage at the Centrepoint Gala Dinner at Kensington Palace on November 26, 2013 in London, England. (Photo by Dominic Lipinski - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 26: (L-R) Taylor Swift, Jon Bon Jovi and Prince William, Duke of Cambridge sing on stage at the Centrepoint Gala Dinner at Kensington Palace on November 26, 2013 in London, England. (Photo by Dominic Lipinski - WPA Pool/Getty Images)

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Prince William, Swift & Bon Jovi perform

Prince William and Taylor Swift join Jon Bon Jovi on stage to perform his rock classic, "Livin on a Prayer."

Prince William, Swift & Bon Jovi perform

Prince William and Taylor Swift join Jon Bon Jovi on stage to perform his rock classic, "Livin on a Prayer."