So I have a video in my head that I saw in the beginning of 2000 I think. It's a guy playing guitarr on like a game show and he's competing against himself, but a cooler himself, and in the end of the video it turns out that the "cooler" self was just lipsyncing and a third version of the singer is actually singing behind a curtain. I think the singer was british, he looked kind of young and it was a slow, pop-song.

Does anyone know the song or the name of the singer?
Thanks!