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After meeting 90210's resident sexy b*tch at a party in LA, Lilo's gal pal Samantha Ronson's apparently developing a celebrity crush! Star reports that S.Ro was smitten with the blonde bombshell, calling her "gorgeous" and saying she "got a great vibe from her"!

But could it turn into something more? We spotted Annalynne kissing a girl last month, and despite Lindsay's vehement denial, X17 spies report that the girlfriends got into another huge fight at club Marquee in NYC last night!

You just know Lindsay's the jealous type -- we can't wait to hear Lindz tell Annalynne to get her 21-year-old 90210 ass away from her girlfriend!