Rumors of a Van Halen reunion with Sammy Hagar have been swirling, but according to the singer himself, nothing's confirmed. Still, the Red Rocker has a busy year ahead: In addition to hosting his weekly Top Rock Countdown radio show, he'll appear at the Acoustic-4-A-Cure charity concert in San Francisco on May 15th, and he's got tour dates on the books with supergroups Chickenfoot and the Circle. We caught up with Hagar to get his thoughts on five classic songs he wishes he'd penned.