Colbie Caillat will be one of the entertainers on the bill at this year's Nobel Peace Prize concert, according to USA Today. Hosted by actor Denzel Washington, the Dec. 11 concert will take place in Oslo, Norway. The concert will honor this year's Nobel Peace Prize winner, who will be announced on Oct. 8. Other performers slated to take part at the event include Elvis Costello, jazz legend Herbie Hancock and up and coming British group Florence + The Machine.
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