Watch: #KatyPerry, #IdrisElba And More Celebs Sing #JohnLennon’s ‘Imagine’ For UNICEF

UNICEF released a new video on Friday, which features many celebs singing John Lennon’s song “Imagine” to raise awareness of children’s rights on the 25th anniversary of the United Nations Convention on the Rights of the Child. Some of the stars in the clip are: Katy Perry, Idris Elba, #CourteneyCox, #NicoleScherzinger, #DavidArquette, #SethGreen. Check out the video below.