Related Clues:

• X-___ (big, in commercial names)
• Lead-in for la la
• __ la la
• "I'm amazed!"
• "Interesting!"
• "Would you look at that!"
• ''That's awesome!''
• Cry at the circus
• Fireworks watcher's exclamation
• ''Oh wow!''
• Exclamation of wonder
• -- and aah
• Caroling syllable
• 'Very impressive!'
• Lah partner