After winning the International Female artist award at last night’s BRIT Awards, Rihanna decided to hit the town to celebrate. The “Birthday Cake” singer slipped into a yellow dress with a twisted bow detail at the waist and partied at London nightclub Mahiki library. She paired her neon look with funky sunglasses, patent blue heels and ankle socks.

Rihanna finally left the club library around 4AM — and appeared to have a red mark on her neck.

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There are rumors that's she's also in town recording for a new album.