Question:  Let's Rock Again! is a music documentary film following a singer that was the lead vocalist of what punk band?
Sentence (from "Bradley Bell (musician)"): Clinton Bradley David Bell (born March 18, 1983 in Davison, Michigan), known professionally as Bradley Bell, is an American keyboardist, pianist, synthesist, and backing vocalist, best known for being the keyboardist of post-hardcore band Chiodos, and also for being the keyboardist of pop punk band Cinematic Sunrise until their demise, and the keyboardist of experimental band The Sound of Animals Fighting.
Relevant evidence: No