Beats By Dre's pre-Grammy party went down last night at the Belasco Theater in Los Angeles. The crowd was treated by a Bad Boy reunion of sorts when Diddy and Mase took the stage and performed some of their '90s era hits like "Been Around the World" and "All About the Benjamins" as well as "Mo' Money, Mo' Problems" (above).

Since finally being released from his Bad Boy contract after 16 years in 2012, Betha has hinted at possibly wanting to sign with either Drake's OVO imprint or Kanye's G.O.O.D. Music. Mase's forthcoming album, Now We Even, is on the way.

[via TMZ]