What is the name of the song from the car wash scene from the movie candy?

The movie Candy, 2005 or 2006 I believe. It has a scene with Abbie Cornish and Heath Ledger where the shoot up right before going into the car wash. The song in the background is some kind of Spanish song I think, and the only word I can make out is "salsa," that is I think that's what the word is. I'm dying to find the name of this song. PLEASE help me. if you know the name of the song or can make out the words so that I can search the lyrics that would be great!