Possible Clues:

• Figure of speech based on comparisons
• One putting on happy expression in comparison
• 'Cool as a cucumber,' for example
• 'Free as a bird,' for example
• Colorful analogy, perhaps
• Yours truly wearing grin makes a literary comparison
• Comparison I show amusement about
• "Cold as ice," e.g
• Figure of speech with 'like' or 'as'
• "Float like a butterfly" or "sting like a bee"