Justin Bieber might currently hold the title of 'World's Biggest Teen Idol,' but back in the '70s, Donny Osmond held it down as one of the decade's leading teen heartthrobs. So, is it a coincidence that Bieber and Osmond are celebrity doppelgangers?

Probably not, since their swooping hairdos, dreamy smiles and puppy-dog eyes combined with their musical talent makes them the ultimate objects of teenage girls' affection. Do you think Justin Bieber (pre-haircut, of course) and Donny Osmond (circa 1973) look alike?