Mary Jane - Rick James
Because I can't find any tabs for this song at all, I'll at least give the chords to y'all right here. I figured it out after carefully studying the original, and videos of Jason Mraz's cover. It's a good cover. You should look it up, or I'll post it later.
The song is in the key of D, I think
Dmaj7 Gm Fm Bm7
That's the basics. If anyone wants to jam, look me up.