Related Clues:

• Join the choir
• Perform with a choir
• When doubled, a New York prison
• Perform on 'American Idol,' e.g.
• Take the mic
• Do some karaoke
• Emulate Justin Bieber
• Be a rat fink
• Rat on the Mob
• Belt one out
• Participate in karaoke
• Be a teller
• Perform with the choir
• Join the chorus
• Go caroling