So, you attend a 30th birthday party and start feeling a little rough afterwards - that's normal, right? You know, nausea, fatigue, appetite loss, eh, fever, diarrhea and jaundice... hang on. Might you have contracted liver disease from one of the bar staff? Bad luck to you Madonna, Demi Moore, Bruce Willis, Gwyneth Paltrow, Lucy Liu, Salma Hayek and Kate Hudson. Oh, and Ashton Kutcher. Best get yourselves off to your nearest clinic for a hepatitis-A shot sharpish. Seriously, you go bearing gifts and come away diseased... In case you haven't pieced events together, Ashton Kutcher threw a lavish 30th for himself at New York's Socialista club on February 7 and has since been informed that one of the waiting staff "was diagnosed with a raging case of Hep A." This isn't the first time it's happened, either. According to IMDB: "Last year, a sick member of celebrity chef Wolfgang Puck's catering staff inadvertently exposed stars including Drew Barrymore and Hugh Grant to hepatitis at a party following the launch of their movie Music & Lyrics."