Anna Nicole Smith's animal toilet

Anna Nicole Smith once urinated in a pet litter tray, her friend has revealed.Fashion designer Pol Atteu claims the late model-and-actress was once trapped on her bus during a promotional tour for diet pill Trimspa, and was so desperate for the toilet she relieved herself in a litter tray.Atteu said: "We were driving and we got stuck when the electrics went out because the Tivo and the VCR caught on fire on the way to Nebraska. We were stuck inside because there were electric doors."We all needed the bathroom. Anna wanted to go first and she was like, 'Just hand me the tray.' We gave her the tray and she squatted and peed in it."The designer also compared the former Playboy playmate's wild life to "a rollercoaster ride".He said: "I've seen her naked more times than anyone else."I've done some crazy things - she always put me in awkward positions.

"I knew it was genuinely just fun, because she knew I was in my element and it was just crazy. Being friends with Anna was like being on a rollercoaster ride."

Anna Nicole died on February 8 aged 39 after she was found unconscious in a Florida hotel room.