Related Clues:

• Aired out one's pipes
• Didn't keep mum
• Squealed, so to speak
• Gave the game away
• Notified
• Succumbed to being grilled
• "I ___ you so!"
• Couldn't keep a secret
• Tattled, slangily
• Joined the chorus
• Imparted
• Performed the national anthem
• Emulated Taylor Swift
• Did some selling out
• Performed in a choir