10 Musicians Who Have Joined Multiple Bands

10. Sammy Hagar

From his humble beginnings on the hard rock scene, Sammy Hagar almost seemed destined for a legendary career. When Hagar was just making a name for himself, he became the lead singer of the hard rock outfit Montrose, whose riffs and songs like "Rock the Nation" and "Bad Motor Scooter" left an indelible mark on future rock legends from Iron Maiden to an impressionable David Lee Roth.

After spending two years singing his ass off with Montrose, Hagar quickly transitioned into a solo career, where he struggled to find his footing at first. As he spent almost 5 five years on his own, he finally started to gain traction with songs like "I Can't Drive 55" and "There's Only One Way to Rock." However, the biggest break for Hagar came when Van Halen came knocking on his door to be their new lead singer after David Lee Roth's departure. Together, the band and Hagar would go on to massive success before Hagar's departure to pursue other musical projects.

Even in his older age, Hagar has adopted many other projects from the Circle to the supergroup Chickenfoot with guitar god Joe Satriani and Red Hot Chili Pepper Chad Smith. With almost 50 years of rock and roll under his belt, the Red Rocker has proved to one of rock's most in-demand voices.