RIHANNA flashed her underwear during a night-out with pals in London.

And it wasn’t an accident.

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Sometimes celebrities inadvertently show their underwear (and sometimes even their private parts) in unfortunate wardrobe malfunction incidents—but in Rihanna’s case, it was totally on purpose.

The singer, who is obviously very proud of her ample butt and super long legs, showed them off during a night of partying at The Cuckoo Club in London yesterday by wearing a large white shirt (which she wore as a dress) with a waist-high slit that provided a peek at the black panties she was wearing underneath.

Click HERE for the pics.

Photo By PR Photos

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