Related Clues:

• Competed on "The Voice"
• Told the cops everything
• Performed by a chorus
• Entertained with a tune
• Ratted out the bad guys
• Delivered some notes?
• Performed a tune
• Sang from the hilltops, maybe
• What angels did during killer show
• What Paul Stanley did
• Done by a choir
• Performed a ballad
• Made peak calls?
• Didn't play an instrument?
• Like some numbers set to music