Anthony Kiedis (RED HOT CHILI PEPPERS) and Dexter Holland (THE OFFSPRING) were the surprise guest musicians who performed last night (Monday, December 20) at the third "Above Ground" benefit concert founded by guitarists Dave Navarro (JANE'S ADDICTION) and Billy Morrison (BILLY IDOL) at the Fonda Theatre in Hollywood, California. They joined an all-star bill that included Perry Farrell (JANE'S ADDICTION), Etty Lau Farrell, Corey Taylor (SLIPKNOT), Mark McGrath and Franky Perez. The event was host Dr. Drew Pinsky and included an art installation by Risk Rock.