Troubled star Lindsay Lohan has alleged that she was assaulted by a waitress "for no reason" while she was partying at a club. The 'Mean Girls' star,who turned 24 on Saturday,said that she was enjoying a night out at an eatery when suddenly one of the staff members turned hostile. "A waitress just hit me - punched me for no reason," Lohan posted on micro-blogging site Twitter. Lohan was partying with friends including Paris Hilton's ex-boyfriend Doug Reinhardt and Brit rugby player Danny Cipriani,when the incident allegedly took place,reported Access Hollywood. But the club worker,Jasmine Waltz,has spoken denied the allegations,branding Lohan a "train wreck". "All I have to say is that disturbed little train wreck is delusional. I didn't hit her. But I'd like too." Lohan,who is still wearing an alcohol monitoring SCRAM ankle bracelet as her punishment after DUI arrest- is not planning any wild night with friends due to her current situation. "I mean there's not much you can do with a monitoring bracelet and no money," her friend said. The alleged assault and already ongoing probation with no birthday celebration,has further grieved the actress who begun her 24th year at a problematic note. Earlier this week,Lohan was sued for $16,000 over the accusal of premeditated fraud and unpaid bills by an upmarket Los Angeles boutique for her free shopping sprees between November 2009 and February 2010.