Rihanna is recording new material in London.

The "You Da One" singer has booked studio time with top up-and-coming UK music producers Burns and Nicky Romero ahead of her performance at Radio 1's Hackney Weekend in London on Sunday. "Rihanna is working with Marina and the Diamonds' boyfriend Burns, a Brighton-based producer who is good mates with Calvin Harris. They've booked three days in the studio, which they'll fit around him doing some work with Kelis. Rihanna's also working with Nicky Romero, another DJ and pal of Calvin," a source said.

Rihanna previously worked with Calvin on her track "We Found Love," from last year's Talk That Talk album.

The 24-year-old has high an extremely high work rate, releasing six albums since 2005. However, the Barbados-born star had delayed her studio sessions as she was reluctant to leave her family in New York, as her grandmother is battling cancer in hospital. "I'm in LONDON bitchesssss. I didn't wanna leave NY! I kept missing my flights hehehe (sic)" she wrote on Twitter.