Related Clues:

• 'I ___ you!'
• Joined the choir
• Tried out for "American Idol"
• Acted the stoolie
• Snitched (on)
• Divulged
• Ratted out
• Went caroling
• Didn't cover for
• Gave away verbally
• Was a fink
• Did a number
• Performed with the choir
• Blew the whistle
• Performed an aria