Britney Spears is considering retirement after she completes her Las Vegas residency in 2015. The pop superstar is heading to Sin City to kick off a two-year stint at the Planet Hollywood Resort & Casino on 27 December (13), and she has now revealed plans to step out of showbusiness once the concerts come to an end. She tells Extra TV host Mario Lopez, "I might (retire), who knows... I may have two more kids and get married... I'd like to have more kids." The Toxic hitmaker is already mother to two sons with her ex-husband Kevin Federline.