She's been called a habitual drug user by an LA judge, has had her children taken away from her and is being forced to take random drug tests, but even these horrible events haven't been able to stop Britney Spears from partying hard. Two witnesses tell In Touch exclusively that just hours after she lost custody of her sons, Sean Preston and Jayden, Britney was out of control drinking and snorting cocaine during a wild party at her Beverly Hills mansion. "I watched Britney let a guy do a line of coke off her chest," LA musician Scott Kohler — who was at Britney's house until the sun came up on October 19 — tells In Touch. But despite what witnesses say, just hours later, Britney passed a court-ordered drug test!

Did Britney cheat on her drug test? Find out in In Touch.