Related Clues:

• Reaction to skyrockets
• Chorus line component?
• "Check that out!"
• Refrain starter
• Enthusiastic sound
• Back-scratchee's reaction
• Lah lah preceder
• ___ poco (soon, in Sorrento)
• __ and aah
• 'What a display!'
• "___ la la!"
• Crowd's response to a fireworks display
• "What a display!"
• ___ la la (singing syllables)
• 'La la' lead-in