Rihanna's daring Met Ball after-party gown Credit: Ray Tamarra/GC Images

Whoa RiRi, that's some low-cut gown!

Rihanna stunned party goers at the Up & Down nightclub in New York on Monday, May 5, by flashing both some butt and side boob in her second outfit change of the evening at her Met Gala After-Party.

The "Pour It Up" singer started the evening baring just her back and midriff in a white Stella McCartney crop top and full length skirt on the red carpet for the famed Metropolitan Museum of Art's Costume Institute Gala.

But in true Rihanna fashion, the stunning singer decided it was time to leave a little less to the imagination, and made a quick costume change into a slinky gold number, with a very plunging back.

With an apparent lack of underwear, the superstar appeared perfectly confident posing for photos outside the exclusive bash.

Rihanna's zest for flesh isn't anything new. Last month she took sheer to a whole new level, showing her nipples in a see-through mesh top at the Balmain after-show party in Paris, France.

The singer and her cheeky outfit were joined at the star studded after-party by Kylie and Kendall Jenner, Kristen Stewart and Riley Keough, Rosie Huntington-Whiteley, Leonardo DiCaprio and Kate Bosworth.