The relationship between Lindsay Lohan and Samantha Ronson has had a rocky start in 2009. The New York Post reported over the weekend that while in Miami for New Year's festivities, the couple "went nuclear" while hosting a party, taking their screaming match to a nearby alley where a witness said Lohan ordered her gal pal, "When I storm off, you are supposed to follow me!" The spy added, "Lindsay was really unstable and flipping out." The pair reportedly continued their fight in their hotel room, where crashing and screaming was heard until 11 a.m., when Ronson and Lohan began punching one another in front of observers. A rep for Lohan told the Post, "There was an argument -- I don't know the details -- but they left for LA together and it's fine."