Pop star Britney Spears celebrated her newfound singledom on Sunday night (19NOV06) by partying in Las Vegas with socialite Paris Hilton. The TOXIC singer, 24, went on a lengthy nightclub crawl to Tryst, Light, Tao and The Playboy Club. Spears got so hot in Tryst, she removed her trousers and sat drinking and smoking in only her satin shirt and fishnet tights. Spears filed for divorce from her aspiring rapper husband Kevin Federline on 7 November (06) after two years of marriage.