Lady Gaga still hasn't fully revisited her crazy costume days, but the singer got one step closer on Thursday when she stepped out wearing a sheer gown with a waist-high slit!

The 30-year-old definitely turned heads when leaving an event for frequent collaborator Tony Bennett at Radio City Music Hall in NYC.

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Not only did the blonde beauty go braless in the black ensemble, but she also flashed her underwear more than once in the barely-there getup (at least she was wearing some!)

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Though we've seen a lot crazier from Gaga — remember the meat dress?! — fans still weren't expecting to see so much of the star.

Scroll through the gallery below for more pics of the performer's raciest looks over her decade-long career!