Related Clues:

• Melodic syllable
• Expression of surprise
• ''La la'' preceder
• With 60-Down, ''Wow!''
• Sing-along syllable
• La-la intro
• Caroler's syllable
• Stunned response
• "___-la-la!"
• 'Pretty nice!'
• ___ la la
• "That's amazing!"
• Cry of excitement
• "Awesome!"
• Start of a refrain