But with 1986's '5150' Van Halen proved they knew what they were doing when they hired Sammy Hagar, even if the result was a markedly different, more mature version of everybody's favorite party band.

says Sammy Hagar, who's beaming a huge grin as guitar ... off the title of the song "Best of Both Worlds," on Van Halen's ...

Sammy Hagar kicked off his Best of All Worlds tour ... but it was great to hear the band revive classics like “5150” and ...

Just two years after successfully handing the keys of one of rock's most valuable franchises over to new singer Sammy Hagar ... of Infection.' (In Hagar's defense, after '5150' and his contract ...