Related Clues:

• Spill a secret
• Participate at karaoke night
• Be a stoolie
• Ruin a surprise
• State secrets
• Do a medley, say
• Croon
• Apple pie seasoning
• Birds do it
• Serenade
• Squeal, so to speak
• Do numbers
• Chatter thoughtlessly
• Tell everyone
• Perform in an opera