And you know who you are...
Taco's Puttin' on the Ritz was originally released in 1991. [UPDATE: or in 1982, and that's the trouble with the internet!] The original Puttin' on the Ritz was written by Irving Berlin (as I believe Rob suggested)
Whatsamatteryou? was released in 1980 by Joe Dolce.
There was something else that was in dispute but I can't remember what.