But with Chris Martin, Bruce Springteen, Kanye West and more to cover for him. They sang many of the greatest hits from U2 and I really do think there are a few songs which are better then their originals.

This concert was done in the light of the World Aids Day on 1 December for the RED campaign
From U2’s website this topic

The World AIDS Day event in Times Square will begin promptly at 7.30pm and feature performances from special guests Kanye West and Carrie Underwood.

Adam Clayton, The Edge and Larry Mullen Jr. will be joined by Bruce Springsteen and Coldplay’s Chris Martin, each of whom will take a turn as frontman on the U2 songs. Appearing at the personal invitation of U2, Springsteen and Martin have graciously donated their time and talents to save the World AIDS Day event from cancellation.