Just a few months ago (when Absolutely '80s could still be had on Jackson radio), I got to hear Billy Crystal's marvelous song on the radio.

Is the song's actual title You Look Marvelous or Mahvelous?

It is "You look marvelous". That was a character Billy Crysatal played on SNL, Fernando. The follow up single was called "I hate when that happens" another take off of a character from SNL.

You Look Marvelous...that sounds right. :)