Troubled pop star Lindsay Lohan and her "best friend" were photographed kissing in Cannes Wednesday night. Did we mention her best friend is a girl?

Lohan, 21, and DJ Samantha Ronson, 30, who have denied reports that they're an item, cuddled, kissed and held hands at a party on P. Diddy's yacht.

But is this a meaningful kiss or another attention-grabbing stunt from the publicity-hungry actress? (Ahem, semi-nude New York magazine photos.) Lohan could be just toying with us - not planning to join the legions of powerful Hollywood lesbian couples.

Lohan and Ronson have been plagued for nearly a year with rumors that they're in an intimate relationship.

Star magazine leaked suggestive MySpace e-mails and text messages last year that were allegedly sent from the "Mean Girls" actress to Ronson. Here's a sample: "Babe, if I don't have you in my life then I should just go die. ... I want to marry you."

Ronson, who was with Lohan before her hit and run DUI in 2007, also allegedly moved in with Lohan to keep her on the straight and narrow.

Lohan was spotted Wednesday night with a ring on her engagement finger, although she reportedly isn't dating anyone at the moment.

Lohan's mother, Dina, recently downplayed reports that her daughter is romantically involved with Ronson, telling "Extra" that the rumors are "silly." Lohan's little sis, Ali, chimed in,"They’re best friends. They’re just friends. It’s pathetic what people say."