Tú, yo y ahora... Dupree

Donald Fagen and Walter Becker, of the popular 70's band "Steely Dan", addressed a humorous letter to Owen Wilson's brother, Luke, on their blog with claims that the idea of "You, Me and Dupree" was stolen from their song, "Cousin Dupree". (Lyrics to "Cousin Dupree" can also be found on their website.) Only the name Dupree, and the possibility that Cousin Dupree and that Wilson's character Dupree both may have slept on a couch seem to be the only common links in their claims. Owen Wilson replied to this fact saying "I have never heard the song 'Cousin Dupree' and I don't even know who this gentleman, Mr. Steely Dan, is. I hope this helps to clear things up and I can get back to concentrating on my new movie, "HEY 19" (which is the title of a Steely Dan song).

When Neil and Dupree are watching the game at Carl's house, Carl gets home, opens a bottle of scotch and pours himself a glass. When he approaches Dupree he is holding the opened bottle, then the cap is on, then it changes to the glass of scotch that was on the counter, then back to the capped bottle.

(Spoiler) At the end of the credits, Lance Armstrong is shown reading Dupree's book and wondering aloud how to pronounce his "ness" name.

Edited into You, Me and Dupree: Deleted Scenes (2006)