Marilyn Manson — Possessed by Jim Morrison … at Live Doors Concert [VIDEO]

You gotta hear this — Marilyn Manson performed LIVE with the freaking DOORS this weekend for the Sunset Strip Music Festival in L.A. … and he”s a dead ringer for Jim Morrison.

Manson took the stage for the special performance Saturday night — singing several Doors songs with the legendary rock band … including “People Are Strange,” “Love Me Two Times,” and “5 to 1” … and we gotta say, he crushed it.

Morrison died in 1971. Manson was just 2 years old. Pretty crazy.