Izzy Stradlin, Axl Rose, Slash and Steven Adler of Guns N' Roses, performing in California in 1986. Marc S Canter/Getty Images hide caption

itoggle caption Marc S Canter/Getty Images

Red Hot Chili Peppers, left to right: drummer Chad Smith, lead singer Anthony Kiedis, new guitarist Josh Klinghoffer, bassist Flea. Ellen Von Unwerth hide caption

itoggle caption Ellen Von Unwerth

The Red Hot Chili Peppers have been together for 25 years. Stephen Stickler/Courtesy of It Books, an imprint of HarperCollins publishers hide caption

itoggle caption Stephen Stickler/Courtesy of It Books, an imprint of HarperCollins publishers