Whether it's Jimmy Fallon impersonating John Lennon, Bill Cosby, and Tommy Lee Jones during his Saturday Night Live audition or Seth Rogan in sh*ts of giggles as Christopher Mintz-Plasse auditions with Jonah Hill and Michael Cera for the role of McLovin in Superbad, every actor or actress no matter how big had to start somewhere in order to break into Hollywood. Here are some of the finest auditions we at collegetimes came across.