Kate Moss allegedly enjoyed a 30-hour drinking session with her new love interest.The supermodel and the mystery man, who bears a striking resemblance to her ex-boyfriend Pete Doherty, were joined by Kate's close pal Davinia Taylor at a London house party on Saturday evening.Caterers were seen arriving with crates of champagne and music equipment and the bash lasted until yesterday morning. A source told Britain's Daily Star newspaper: "The three of them arrived at their friend's house party at tea-time Saturday."Kate's arm candy obviously underestimated his famous girlfriend's boozy prowess, and arrived with just one bottle of wine."However, caterers soon arrived so alcohol was flowing all night. Kate spent most of the bash attached to his face, only breaking away for air or alcohol."Kate, 33, still managed to attend an important work meeting soon after the party finished to discuss her latest clothing range for British high street fashion store Topshop.However, the model's heavy partying is concerning her friends who are worried the mother-of-one is not taking care of herself properly. A source added: "Her friends think she is pushing herself too hard and she weighs less than an atom these days. She partied for almost two days solid and then spent a day in fashion meetings without time for food."Last month, it was reported Kate had rekindled her tempestuous relationship with Pete.The couple split in June after Pete spent the night with a South African model. However, the pair were said to have rekindled their romance last month,after spending five nights together at London's exclusive Claridge's hotel.