Possible Clues:

• “Picture yourself in ___ on a river” (Beatles lyric)
• Lyle Lovett song 'If I Had ___'
• 'Three Men in --' (novel or film)
• Lyle Lovett's 'If I Had --'
• 'Three Men in ___' (Jerome K. Jerome novel)
• 'If I Had --' (Lyle Lovett song)
• Answer to the riddle 'Weight in my belly, trees on my back, nails in my ribs, feet I do lack'
• "If I Had ___" (Lyle Lovett song)
• 'I'm On ___' (2009 song by The Lonely Island featuring T-Pain)
• 'If I Had ___' (Lyle Lovett song)