Britney Spears hit up a dance studio in Thousand Oaks, CA, yesterday. She looked like she had been working up a sweat as she left the studio in her gym gear with a bottle of water. It was back to dancing less than 24 hours after Britney debuted her new brown hair at Elton John's Oscars viewing party on Sunday. According to Britney Spears's hairstylist, she decided to switch up her locks because she was "ready for a change" and is "very happy" with her new look. The change of locks and return to the dance studio may be signs of big things on the horizon for Britney. She has been tweeting about working on new songs for the past two months, and is rumored to be in contract negations to perform in Las Vegas.