I think it's a 70's song (could be 80's), and I think it's also used on a lot of commercials.
I also know that Paul Schaffer from Letterman plays the song sometimes in commercial breaks. The song sort of sounds in the intro like someone playing notes on a glockenspiel or something, sort of like "tah-tah-tah-tah, tah-dum, tee-dah"
About part way through the song, there is a very impressive guitar solo as well, that lasts about 30 seconds or so, I'd say
Also, a female singer -- and for some reason, I recall the word "Extra" being in there somewhere