It was a full moon at the Met Gala, except it had nothing to do with nature.

Madonna bared her booty on the red carpet Monday night in New York City while wearing a custom-designed Givenchy creation by Ricardo Tisci that left very little to the imagination.

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And that wasn’t all.

The 57-year-old singer also flaunted her … assets, though her breasts were strategically covered up by tiny strips of black tape and lace fabric.

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Madonna’s outfit, as raunchy as it was, also had the most bling. The “Rebel Heart” singer was draped in 400 carats worth of Neil Lane diamond, from the amulettes to the chains to the bracelets.

Impressive.

The entertainer stepped out amid an ongoing custody battle with ex-husband Guy Ritchie over their teenage son, 15-year-old Rocco.

Madonna and Rocco reunited in London on April 29, and she shared a heartwarming photo of the two of them enjoying each other’s company, with the caption, “We need [love]!”