Britney Spears is "torn" about leaving her Las Vegas residency. The 'Toxic' hitmaker has been offered a contract to continue performing at the venue beyond 2015, but is unsure whether or not to accept the offer. She admitted: "I'm not really sure. I haven't made up my mind. I really love doing the show. It's a lot, a lot of fun but I'm kind of torn right now. I don't really know what I want to do." As well as working on her residency, the singer is also busy in the studio recording new music. Speaking to E! News at the Teen Choice Awards last night, she said: "We're having fun right now. I'm working with some women who are amazing writers. I have ballads and, of course, dance music--fun cheeky sexy stuff."