LiLo and Ronson split might be the real deal this time

Troubled headline-hitter Lindsay Lohan has had a tough week.

Following an awkward impromptu appearance at gal-pal Lily Allen's Los Angeles gig on April 2, where the British singer practically ignored the actress's presence entirely, it seems as though Lindsay's party license has been revoked all over town.

According to OK! Magazine, Samantha Ronson, Lohan's on-again-off-again belle, was DJing a party for her sister at upscale Bar Marmont Friday, but Lohan wasn't on the guest list.

Sources told OK! that the doormen at the event were under strict instructions from Ronson's family that the actress was not to be allowed access to the party under any circumstances. "Unless Lindsay rams a truck through the red carpet or skydives in, she won't be here," the unnamed source insisted.

Predictably, though, Lohan appeared anyway, only to be stopped at the door and forcibly restrained by five security guards. If Ronson was troubled by Lohan's absence, she didn't show it, with one onlooker observing, "She looked like she was in a great mood."