Possible Clues:

• Gotye "Somebody ___ Used to Know"
• 'Not ___ know of'
• "Not ___ know of"
• ''Not __ know of''
• Alanis Morissette "___ Would Be Good"
• "Not ___ care"
• 'Not ___ care'
• "You're the One __ Want": "Grease" song
• 'Not -- know of'
• 'You're the One ___ Want' ('Grease' song)