Before there was Jonathan Taylor-Thomas or Justin Bieber, there was David Cassidy. Teen heartthrob of the seventies, Cassidy starred as Keith Partridge, the eldest of the singing kids on the The Partridge Family. With hair like a Charlie's Angel and that confident, easygoing smile, he made girls across America scream. He rose to teen idol status in a slew of bedazzled bell-bottoms and velvet vest-suits, many of which will be auctioned off to adoring fans in May. Today, the "I Think I Love You" singer turns 63. To celebrate, put on your finest fringe and lose yourself in Cassidy's soulful voice and epic hip movements.