Paul Shaffer might play the part of the oft-befuddled but always fawning bandleader to perfection on “The Late Show with David Letterman,” but the guy’s a musical legend. He spent 1975 to 1980 as the musical director of “Saturday Night Live” band, did the same duty for The Blues Brothers, is regularly called upon to provide backing for the Rock and Roll Hall of Fame induction ceremonies, and, of course, played Artie Fufkin in “This is Spinal Tap.” He’s also a songwriter (he co-wrote “It’s Raining Men,” you know) and, on rare occasions, he’s even stepped out and been a recording artist in his own right. In 1990, Shaffer released an all-star collaborative effort entitled Coast to Coast, where he attempted to take listeners on a cross-country musical expedition which blended different musical genres, often within a single song. The album’s first single was a little ditty called “When the Radio Is On,” and when Shaffer premiered the track on “Late Night with David Letterman,” I was watching in awe as the breathtaking harmonies washed over me.

The first couple of minutes of this clip are strictly Shaffer introducing his crew for the song, so if you want to skip ahead to the 2:26 mark, I’ll save you the time by providing you with the roll call: Will Smith (then still known solely as The Fresh Prince), Daddy O (Stetsasonic), Jay Siegel (The Tokens), Johnny Maestro (The Crests, The Brooklyn Bridge), songwriter Ellie Greenwich, actress Carol Kane (filling in for Carole King, ho, ho), and the King of the New York Streets himself, Mr. Dion DiMucci.

As Shaffer describes it, “It’s doo-wop, it’s hip-hop, it’s a nutty thing.” Me, I’m not saying the song’s perfection, mostly because Shaffer shouts his vocal contributions, but the overall enthusiasm is downright contagious…which, I suspect, is why I still have Coast to Coast in my record collection.