Rihanna is back to work in London after several days of partying and celebrating her BRIT award. She spent a full day in the recording studio in addition to working on her video. The British paps are saying she left the studio very late on Friday looking exhausted. Unfortunately, she didn’t get much sleep in her hotel as she tweeted the following. ” How in the phuck iz my fire alarm gonna give me my wake-up call??! #Classic” Let’s hope she has been too busy to read the tabloids and see what Chris Brown is up to.