Forget the drugs, the cars, the Grammys, the stadiums of hysterical fans. The real reason musicians even pick up a guitar in the first place? The girls. Since the beginning of the rock era, groupies (or muses, or band-aids) are what make the music world go around, kids! From classy chicks with a penchant for rock star boyfriends/husbands to the quintessential tour bus broads, these ten groupies are the most celebrated of all time.