A Casual Rihanna Strolls Around London (PHOTOS)

Amid rumors that she is back together with Chris Brown, Rihanna was all smiles Friday in London.

RiRi wearing a black baseball cap, baggy trousers, Adidas trainers and a T-shirt hit the streets this evening and even smiled for awaiting photogs.

Chris and Rihanna are fueling rumors the two may be back together…professionally and personally. Brown is said to be featured on her new single Birthday Cake in a collaboration that will “shock the world,” said the track’s producer.

While both of their reps have stayed quiet regarding the song, Chris’ rep told Life & Style the two are not back in a relationship.  

“Chris and Rihanna are friends again,” his rep said denying any romance: “They’re just friends.”