Possible Clues:

• See 15
• 'Outside of ___, a book is man's best friend ...' (Groucho Marx)
• Ouida novel '___ of Flanders'
• As sick as —
• 'On the internet, nobody knows you're ___' (classic New Yorker cartoon caption)
• "It's been a hard day's night, and I've been working like ___"
• What Iggy Pop wanted to be on '69 hit
• Pet Shop Boys "I Want ___"
• "Conversation With ___"
• "Me and You and ___ Named Boo"