Never one to shy away from flashing the flesh, the 'Umbrella' singer shunned underwear in favour of flaunting her booty in a seriously low-backed gold gown on Monday (5 May).
We really shouldn't be surprised, however, given those semi-nude pictures RiRi recently took for French magazine Lui. The starlet appears topless on the cover of the publication and gets pretty much naked inside, showing off her bikini tan lines by, well, not wearing any bikini.
And then earlier this year, she flaunted her boobs in their entirety by wearing a completely see-through top at Paris Fashion Week.
Is there any part of Rihanna we haven't seen yet?!
Yesterday, earlier in the evening, the Barbados-born singer had covered up (slightly more) in a smoking hot white Stella McCartney outfit to attend the Met Ball main event.
Although the ensemble was backless, it didn't show quite as much as her racy evening wear!
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The Met Ball 2014 in pictures:
Copyright: WENN Andres Otero