"Puttin' on the Ritz" is a song originally performed in the 1930s musical film, Puttin' On The Ritz and is covered by The Chipmunks in the Alvin and the Chipmunks episode Don't Be a Vidiot.
Lyrics
The Chipmunks: If you're blue and you don't know where to go to Why don't you go where fashion sits? Puttin' on the ritz Different types who wear a daycoat, pants with stripes And cut away coat, perfect fits Puttin' on the ritz Puttin' on the ritz Puttin' on the ritz