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I'm wrapping this playlist for the year. It has been updated with a few new adds (Jill Scott, Van Hunt, V. Bozeman) and includes every track mentioned on thread that is available via Spotify's US catalogue as of EOY 2015. If I missed something or if a track comes available sometime in the future, bump here to let me know and I'll add.
Rolling R&B 2015 Thread Spotify Playlist