Grace Jones could teach Lady GaGa a thing or six about crazy!

The original outrageous pop star unleashed her trademark brand of out-there in front of a rapt audience at the Hammerstein Ballroom, NYC, on Thursday.

With her statuesque body still looking fabulous at 61, Jones wowed the crowd with one outlandish - and often revealing - outfit after another.

We're not sure what was more disconcerting - the sight of Jones dancing with half a mannequin, or her bare bottom, which was on display more than once.

Famous faces in the audience included Bette Midler, Rosario Dawson and Randy Jones of the Village People.