British act Florence and the Machine, pianist Herbie Hancock and singer-songwriter Elvis Costello will perform at this year's Nobel Peace Prize Concert in Oslo, reports the Associated Press.

25-year old pop singer Colbie Caillat revealed that she’s also in the line-up for the show via Twitter this morning. “I'm happy to announce I am going to be a part of the Nobel Peace Prize Concert in Oslo, Norway this year on Dec. 11! ,” the “Lucky” Jason Mraz collaborator said. “I'm excited…”

Academy Award-winning actor Denzel Washington will host the show, which will be held a day after the award ceremony in Oslo on Friday 10 December, the anniversary of prize founder Alfred Nobel's death in 1896. The winner of the 2010 Nobel Peace Prize will be announced before both the award ceremony and concert, on Oct. 8.

Last year, American rap artist and actor Will Smith and his wife, the actress Jada Pinkett Smith hosted the Nobel Peace Prize Concert, which honoured the 2009 peace prize laureate, US President Barack Obama.