Looking back on some of the famous, and not-so-famous rock star feuds over the years....David Lee Roth and Sammy Hagar have tossed subtle, and not so subtle, insults at each other in their rivalry as frontmen for Van Halen, Paul McCartney tells the now famous story of how after he gave then-friend Michael Jackson some investment advice about how lucrative it is to buy the publishing rights to songs, Jackson turned around and bought the company that published the Beatles' catalog....Motley Crue's Tommy Lee and Kid Rock had a nasty rivalry surrounding each guy's relationship with Pamela Anderson....get the scoop on all those, plus lots more rock star rivalries, here.