During U2's show at The Forum venue on Tuesday night (26May15), the frontman singled out Joe Hier and gave him the chance to sing with him on stage.

Bono performed The Sweetest Thing with Hier, who fronts tribute act Hollywood U2 and was decked out in the singer's trademark costume complete with tinted sunglasses and a similar hairstyle.

The singer said, "I saw myself in the crowd here... You're looking really good, my man," and after the song he told his doppelganger, "(You have) a great voice".

Speaking after the show, Hier, 45, added, "I went to the show because I hoped I might meet Bono. My dreams came true... I haven't been able to sleep since the performance and I am still high on that feeling."