The new song was released on Thursday with all funds going to rapper Will's i.am.angel foundation to raise money to stop violence in America
Matthew Koma shared a black and white photograph in which the actress on Instagram
The celebrities take turns to sing a line from the John Lennon classic. Priyanka sings two lines in the song. The first, "imagine there's no countries," as a duet with model Suki Waterhouse, and the second, "a brotherhood of man," as a solo.
will.i.am launched into a tirade of abuse aimed at the airline on Twitter to share his dissatisfaction