Bruno Mars had an all-star pre-Grammy jam session at Club Bardot in Hollywood Friday night. He was joined by Keri Hilson, Monica, Far East Movement, K'Naan and Wynter Gordon for some of his songs, their songs and covers.
This video here has some snippets of a couple of performances - Bruno and Keri singing "Grenade", Bruno and Wynter covering Ginuwine's "Pony", Monica singing "Before You Walk Out Of My Life" with Bruno on backup, Bruno and Far East Movement on "Like A G6" and K'Naan and Bruno on "Wavin' Flag".
(video from Freeintegrated)
Couple of more videos here, from 2winAAX4:
Far East Movement with Bruno and Keri singing "Rocketeer":
Bruno singing "Seven Nation Army" and "Just The Way You Are" with a twist:
BrunoMarsFans.com reports that Bruno also covered "My Heart Will Go On", "Your Love" by the Outfield, "Every Little Step", "Poison", "This Is How We Do It" and "I Want You Back."
If any more videos pop up, I'll add here.