There were a bunch of songs that got leaked just before the "Evolution of Robin Thicke" dropped (2006 maybe?). And I don't think most of them made the final cut.

I think some of his best stuff was among those songs.

"U Center Me"
"Superman"
"I'm Not Loving You"
"Cocaine"

Recently though, I've noticed that Spotify has included a "Fan Version" of the album that includes some of these songs.