Planes Trains & Automobiles Song?

I was in a store the other day that was playing satellite radio and a song came on called Candy Man and I am positive that the opening riff (maybe it's not the opening riff but it's definitely in the song somewhere) was the same exact riff you hear in Planes, Trains when Steve Martin realizes that his car is not in space V-5 in the car rental lot. It's a bluesy, harmonica type sound.

I've searched everywhere on the web and I can't find that version of Candy Man. It's the Candy Man made famous by Roy Orbison (written by Fred Neil) not the one by Sammi Davis or Mississippi John Hurt and its making me crazy because not only was it a great version (which I'd like to download) but I need to know if that little riff in the movie came from that song...

I've never seen any reference to this song being in the movie so I could be mistaken and it's very difficult to search for a song with 'Candy' in the title when one of the stars of the movie is named Candy... so any help would be appreciated.

Thanks :-)

thwizzit, April 10, 2010; 7:28 PM