Lindsay Lohan has another nightclub argument with Sam Ronson

Lindsay Lohan and girlfriend Samantha Ronson have reportedly had another public argument.

Sam was DJing at Prive in Las Vegas on Monday night when the incident is said to have occurred.

One onlooker reports: “Lindsay decided she was going to surprise Sam at the club and showed up around 1am.

“Sam appeared to be furious and the two started to argue in the DJ booth, before Lindsay began dancing wildly.

“Sam left on her own at 3am, looking grim faced, and then a panicked-looking Lindsay raced out to her car with a drink in her hand, which she handed it to a security guard.

“[She shouted] ‘Did she leave in my car? Did she f***ing leave? Did she f***ing leave?’ [before chasing after her].”

The two women, who have been dating for a little over a year, have had a number of high-profile public spats, the most recent before Monday’s episode left Sam furiously apologising during New York Fashion Week.