Britney Spears invited a man to snort cocaine off her chest during a wild party at her Hollywood mansion just two days after losing visitation rights to see her sons, it has been reported. Scott Kohler, 29, claims he and a group of 10 other strangers were invited to join Spears for a night of heavy partying on 19 October (07), when the troubled star drowned her sorrows with vodka and cavorted with the men in her jacuzzi. And musician Kohler alleges the 25-year-old singer accepted an offer of cocaine from a fellow partygoer, after he "joked he wanted to do a line off (Spears') chest, and she agreed", reports British newspaper The Sun. Kohler adds, "(Spears) was in a great mood. She didn't have a care in the world." The latest revelations will be a blow to Spears as she fights her ex-husband Kevin Federline for custody of two-year-old Sean Preston and one-year-old Jayden James. She has since won back visitation rights to see her two boys three times a week, but must comply with an earlier court order to undergo mandatory drug and alcohol tests and well as attend joint parenting sessions with dancer Federline. The former couple's next custody hearing is set for 26 November (07).