While in the midst of his ridiculous and incredible promo campaign for last year’s My Beautiful Dark Twisted Fantasy, Kanye West stopped by at Facebook’s offices.

While there, he performed some new material acapella – some of which made the album, some of which (a track called ‘Mama’s Boyfriend’, didn’t). Half a year on from the album’s release, the track has surfaced. Stream it below [via Consequence of Sound].

Stream: Kanye West – Mama’s Boyfriend