I been looking for this fic that I read a really long time ago. This is what I remember from it:

Harry wakes up in a different timeline/dimension where he is a muggle. He doesn't recognize anyone, except Draco Malfoy who happens to be very famous. I wanna say famous rock star.... Anyway, since he is the only one he knows, Harry goes and tries to talk to Draco by standing in line for his autograph...It just happens that Draco is also aware of the timeline change but seems happy with it. He still helps though.

We believe you are looking for Star Quality by who_la_hoop (118k, E)