My turn? Cool...
Marvin Gaye - In the Groove
This album would eventually be re-released as I Heard it through the Grapevine after the "title track" became a big hit. But In the Groove was the first release of this album. Interestingly enough, the track that Motown had wanted to be the "official" single of In the Groove (You) is actually my favorite song on the album, and one of my favorites of all time, although Grapevine is up there, too. Lots of other great songs on this album as well, including the under-appreciated Chained.