Most people are fans of particular groups or of particular genres. I, too have my favorites in these areas, but I also have a favorite song. Not a favorite version of a song, but a song for which I seek out various artists' interpretations. I have bought a few albums simply because the artist does this song.
My favorite song is Caravan, which was composed by Juan Tizol and Duke Ellington. Here is a sampling of Caravan renditions:
Wynton Marsalis (jazz quartet):
11 String Duo (two guitars):
Michel Petrucciani (Solo piano):
And finally, if this version by The Bryan Setzer Orchestra doesn't get you moving, you just might be dead:
It's a real testament to the song that it works so well in so many different modes. The first version I remember is by Wes Montgomery, but I didn't know he was the artist, so when I went looking for it years later, I found various versions of my favorite jazz standard.
Other versions of note: