Welcome Back, Kotter
In 1975, John Travolta landed a star-making role on this classic TV sitcom. As Vinnie Barbarino, the cocky leader of a group of teenage misfits, John sent teen girls' hearts aflutter. Vinnie is best known for his long locks, lower-than-average IQ and not-so-catchy catchphrases. "Up your nose with a rubber hose," really?