//gaga booty  wide

Lady Gaga bared all Sunday night at the swanky West Hollywood hotspot Chateau Marmont in a see-through studded bodysuit that not only showed off all her best assets, but also a rashy patch on her buttocks, and RadarOnline.com has all the photos.

The provocative outfit — which showcased a sexy black bra and black thongs underneath a bedazzled clear outfit — was topped off with a pair of Christian Louboutin high heels.

Gaga, 27, appears to have a rash of acne on her rear end that was photographed by eager paparazzi waiting outside the venue.

Used to being nude, Gaga recently debuted an ‘ARTPOP’ piece in which she appears naked and also has full-frontal nudity in a new video with Marina Abromovic.