U2 were joined by ex-Oasis guitarist Noel Gallagher for the closing number at the O2 Arena in London Monday.

Bono introduced Gallagher as "one of my heroes, one of the band's heroes." The former Oasis guitarist, who now fronts his High Flying Birds, helped out on "I Still Haven't Found What I'm Looking For," singing the second verse alone and sharing lead vocals with Bono on the third verse. They then launched into a version of The Beatles' "All You Need Is Love" that brought the evening to a close.

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