R&B and pop singer Rihanna is pictured visiting the studios of BBC Radio One to promote her latest single.

R&B and pop singer Rihanna is pictured visiting the studios of BBC Radio One to promote her latest single.

Rihanna has opened up about her sadness at missing her pal Kay Perry's wedding.

"I am crushed that I missed that," she said. "I will never, ever forgive myself."

Obligations related to her new album are said to have kept the Umbrella singer from being on hand to celebrate with the couple.

Calling in to Ryan Seacrest's radio show earlier this week, Rihanna revealed that she and Perry are set to team up in the recording studio.

"She actually sent me a song a while ago and she wanted me to be a part of it," the 22-year-old said E! Online reports.

"And I was like, 'Hell yeah, of course, that's my girl,' and the song is amazing. So we'll be recording that together pretty soon."