The Timberlake- Moves from child star to international sensation to successful producer, but is best known for singing songs about his dick. 

H for Heidi- Goes from wholesome young kid to a plastic surgery Hindenburg.

Where's LaBoeuf?- Cuts his teeth in Disney flicks but moves on to more serious roles, has hand bitten off by robot. 

That's so Bieber- Gets spot on Cosby Show, bringing cuteness ratings to all-time high, show ends, gets fat.

The McFly- Lands a TV show then some movies, cultivates status, gets Parkinson's.