Related Clues:

• 'La-la' lead-in
• Exclamation before 'Look!'
• Cry at fireworks
• Pleased sound
• 'That's awesome!'
• 'I'm impressed!'
• ''Wow!''
• 'Rad!'
• Exclamation of admiration
• 'Would you look at that!'
• ___ and aah
• Swooning sound
• See 27-Down
• 'How wonderful!'
• 'Impressive!'