15 Images

Musicians on a mission

Madonna (Spencer Weiner / LAT)
Justin Timberlake (Marcel Antonisse / EPA)
Kanye West (Matt Dunham / AP)
The Police: Andy Summers, Sting, Stewart Copeland (D. Ross Cameron / AP)
Kelly Clarkson (Peter Kramer / Getty Images)
Akon (Roger Kisby / Getty Images)
John Legend (Evan Agostini / Getty Images)
Joss Stone (Getty Images / Getty Images)
Al Gore and Melissa Etheridge (Myung J. Chun / LAT)
Beastie Boys: Adrock, MCA, and Mike D (Guido Manuilo)
Red Hot Chili Peppers: Flea and John Frusciante (Kevin Winter / Getty Images)
Metallica’s Robert Trujillo (Paul Hawthorne / Getty Images)
Spinal Tap: Harry Shearer, Christopher Guest, Michael McKean (AP Photo / MGM Home Entertainment)
Smashing Pumpkins’ leader Billy Corgan (Victor Lerena)