The Beatles scene is brilliant

On Youtube there are various extended versions of this brilliant scene.

Dewey asking 'What do you think, George Harrison of the Beatles' is (I'd like to think) a reference to the song Frank Mills from the musical Hair:

He was last seen with his friend
A drummer, he resembles George Harrison of the Beatles

Also, in the 7'04" extended version, the soliloquy of Justin Long / George Harrison is spot on.

Ah, this film is clever and delightfully funny!

(Link to the extended version: https://www.youtube.com/watch?v=6frgnqTo1eM)