Is Lilo off the market?

Lindsay Lohan arrived at LAX last night to catch a flight to London, and we couldn't help but notice that gigantic diamond rock on her wedding finger! Could the actress be secretly engaged to that secret boyfriend her dad Michael told us about a couple months ago? It certainly seems like that could be the case. Either that, or she's simply trying to get attention by making people think she's headed to the chapel.

Although the rehabbed redhead recently hit a snag for getting behind on her court ordered community service, she has been staying out of trouble for the most part in the past year, which is maybe why she filed a lawsuit against Fox News for claiming that she and her mother Dina did cocaine together. The Mean Girls star could be attempting to clean up her image before becoming a Mrs.!

Now the big question - who is she even dating?