DMX — Crashes Alicia Keys Concert … UP IN HERE!!

DMX did not get arrested last night … but he did hijack Madison Square Garden — turning an Alicia Keys concert into an absolute insane asylum … and the video is AWESOME!!

First, the crowd went berzerk when a mini Ruff Ryders reunion broke out — Alicia”s husband Swizz Beatz and DMX hit the stage for a few bars of “Ruff Ryders Anthem.”

But you”ve gotta see what happens when they launch into “Party Up (Up in Here).”

2000 was a damn good year.