Best buddies idol groups BEAST and MBLAQ had an ultimate showdown on the SBS “2009 Gayo Daejun” music festival on December 29th. Maybe after watching these performances, you can finally choose which one you like better.

After a fight scene and a dance battle, BEAST performs “Mystery,” and MBLAQ performs “Oh Yeah.”

Who do you think won?

MBLAQ vs. BEAST intro and dance battle