Soot and Stars
I AM SOOT!
Oh lord... I forgot about that SNL skit Slip.
I haven't seen too much of Justin's acting but from what I've seen he has the potential to be a good chameleon. The Social Network was pretty darn good too.
Sound, I think he looks pretty similar to Sir Elton in the vid in the OP. If Elton sees the potential he's worth a shot. I thought Joaquin Phoenix did a superb job in Walk the Line but he wasn't exactly a doppelganger.
I forgot about the Social Network. Actually the guy he played was very eccentric so that's good going into his current role of playing Elton. Vottom line is Justin is about as charismatic as it gets and the supersedes most any flaws one can have. You either have "it" or you don't!