Related Clues:

• Open-mouthed Facebook reaction
• 'That is so cool!'
• 'How lovely!'
• "Ooh!" or "Whoa!"
• "___ la la"
• ELP "___, what a lucky man he was"
• 'How pretty!'
• Reaction to a magic trick
• 'Ver-r-ry interesting!'
• 'That is sooooo cool!'
• "Aah" counterpart
• Partner of 55-Across
• Gasp at a fireworks show
• '___, I'm so scared! (not really)'
• ''Call on me!''