Lady Gaga exposes her butt in public

She has mastered the art of making heads turn for a second look.

So doing what she does best on Friday evening Lady Gaga made workers at Hamburg's O2 World do the double take as she left the arena while flashing her derrière.

Clearly comfortable in her own skin, the 28-year-old strutted along in an oversized printed T-shirt teamed with fishnet tights and black stilettos.