Possible Clues:

• "What ___ For Love" ("A Chorus Line" song)
• "___ it!" (cry of accomplishment)(2 words)
• 'Oops! ... ___ It Again'
• 'That was me'
• Positive answer to 'Have fun?'
• Britney Spears' 'Oops!...__ It Again'
• Possible response to "Who took the last cookie?"
• "It was me"
• 'That ___ love thee, Caesar, O, 'tis true': Shak
• 'That's on me'