Possible Clues:

• Child's "I'm innocent!"
• 'I've got better things to do'
• Reply to “Whodunit?”
• Pink Floyd "There's someone in my head but it's ___"
• "Pick someone else!"
• Reply to "Who wants to clean up this mess?"
• Duran Duran "Someone Else ___"
• Blame-dodger's phrase
• Gainsayer's words
• "Sorry, wrong guy"