Rihanna Wardrobe Malfunction Avoided [PHOTOS]: 'Diamonds' Songstress Parties Braless with Cara Delevingne in Sparkly Top, Supports Brother Rorrey Fenty Rapping in London

"Diamonds" songstress Rihanna was spotted partying in London on Sunday, June 16 in a sexy, racy sparkly top. But this time around, RiRi managed to narrowly avoid an embarassing nip-slip wardrobe malfunction (although she did hit the town braless)! The Barbadian beauty spent the evening clubbing with a group of close gal pals (including BFF Melissa Forde and stunning model Cara Delevingne), and she even hit up the hotspot Boujis to support her brother Rorrey Fenty's rap performance. But as Rihanna stepped out of her limo at one point during the night, she almost flashed the entire crowd of avid paparazzi. Check out the photos below!

RiRi and her gorgeous posse hit up the members-only after-party following her "Diamonds World Tour" performance in Twickenham over the weekend. The "Stay" songstress was there to support her lil bro GQ Gallest (Fenty), an aspiring rapper. Rihanna and her crew partied hard at the club until the wee hours of the morning. One insider said, "She was going wild dancing on the seats with Cara. Despite being the superstar of the family she gave her brother amazing support and definitely the loudest cheers." They ordered bottles of Hennessy, Grey Goose, coconut Ciroc and champagne throughout the night. 

But before the festivities, RiRi flashed some major underboob in her skimpy, sparkly get-up:

Check out more pics here.

No matter what, Rihanna always looks stunning! Apparently the night turned out a huge success (with no Chris Brown drama!).