Hip Hop superstar Kanye West has posted clips via his KanyeUniversity.com blog, of him performing several new songs at Facebook headquarters in Palo Alto, California. The G.O.O.D Music leader treated employees of Mark Zuckerberg’s pioneering social networking site to acapella  versions of “Lost In The World/Chain Gang” and “Mama’s Boyfriend.”

West, who has been plugging away at Good Ass Job, his album tentatively scheduled for fall, unveiled those songs while standing on a table, wearing a tailored suit.

The emcee/producer thanked the audience via his site, “Your energy was a gift so electric, so genuine, that it really helped me give my best.”

Facebook has yet to release a statement on the performance.