Related Clues:

• Audible admiration
• Upscale
• Aah partner
• "I'm impressed!"
• Crowd's gasp
• Sound of amazement
• 'Isn't that pretty!'
• "Good job!"
• Fireworks sound
• "Amazing!"
• Awesome!
• Expression of disbelief
• Backup singer's syllable
• Awed one's reaction
• "Holy cow!"