{blackbabes} Rita Ora Flashes Panties on Birthday Night Out With Calvin Harris-See Her Wardrobe Malfunction!

Rita Ora flashed a lot more than a smile during her night out in London Tuesday night!

The sexy Brit singer, who turned 23 yesterday, stepped out with pals and DJ boyfriend Calvin Harris earlier this week to celebrate her birthday.

Rita was snapped heading to central London hot spot The Box in a plunging retro dress that showed lots of cleavage and leg. At one point, her dress rode up just high enough that photogs got a peek of Rita's panties! She completed her b-day look with a fur coat and black heels.

Hey, it's her birthday and she can have a wardrobe malfunction if she wants to.

Meanwhile, Rita, who donned a '70s-inspired platinum hairdo, was accompanied by a group that included Eve, actress Kelly Brook and her beau Calvin Harris. Rita and her man partied into the wee hours of the night.

Rita tweeted a pic of her and a pal in their retro garb, writing, "Studio 54....70's The ORA and Devolle way @kyledevolle #itsmyBirthday."

She also shared a sexy pic of herself hiding her boobs behind a pillow, writing, "Birthday girl!! today I'm allowed to be A F***ING STAR! Thank you everyone for the birthday wishes and I love you!!!!"

What do you think of Rita's retro b-day look?

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