LMFAO hits the stage with surprise appearance by Justin Bieber and David Hasselhoff. Video

LMFAO hits the stage with surprise appearance by Justin Bieber and David Hasselhoff. Hey everyone this is Nora Gasparian for Hollyscoop. LMFAO hit the stage last night and put on one heck of a performance closing out the show. They had several surprise guest appearances. One that everyone is still talking about was when David Hasselhoff hit the stage and stripped down to his underwear. Not a scene we wanted to see. Later, the one and only Justin Bieber hit the stage and danced with the fun party rock crew. LMFAO performed their two hit party songs "Party Rock Anthem" and "Sexy and I Know It." Anytime LMFAO is involved you should know that there is going to be one heck of an interesting and fun performance.