"Always an awesome festival! Five years and counting. Hughcevans and the entire team. Global Citizen festival, thank you. You are the best," Hugh Jackman tweeted
Priyanka sings lines from the song, squeezing emotion out of each. Actor-director Jodie Foster does the same, except that she recites the lines rather than sing them
The 33-year-old actress now featured in a video with international artistes like Jennifer Lopez and Cristiano Ronaldo in Enrique Iglesias' song Don't You Need Somebody
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.