Lindsay Lohan back in Vegas — minus Ronson

Saturday, June 27, 2009 | 10:39 p.m.

Lindsay Lohan at Wet Republic on June 27 in advance of her twenty-third birthday. The actress turns 23-years-old on Thursday July 2.

Erik Kabik/Retna / www.erikkabikphoto.com

Lindsay Lohan at Pure.

When Lindsay Lohan returned to Las Vegas this weekend, she didn’t bring her most controversial accessory with her.

Celebrity watchers’ favorite scandal-prone redhead was at Wet Republic Saturday afternoon, but her on-again, off-again and apparently now former girlfriend, Samantha Ronson, was not.

Alas, Ronson has a double-gig in Atlanta this evening, and instead of joining Lohan,she sent the soon-to-be birthday girl a message via Twitter.

“Have fun,” Ronson said.

Lohan’s reply was warm: “Thanks baby!”

The former couple were last photographed together in Las Vegas by paparazzi on March 10. That night Lohan danced alongside her then-plus-one in the DJ booth as Ronson performed a guest set at Privé.

Lohan’s on-again-off-again girlfriend has returned to the turntables at the popular Planet Hollywood nightspot several times since that night, but Lohan has not joined her.

While whispers of yet another reconciliation for the duo (as well as single-sided attempts at one) have repeatedly been heard during the past few months, Saturday’s single showing would seem to be yet another indication that the couple have, in fact, called it quits and are just friends.

Lohan was at MGM Grand on Saturday to celebrate in advance of her birthday next week. The embattled and dramatic actress-singer-entrepreneur will turn 23 Thursday.

The enterprising socialite used her poolside party to promote her line of tan-in-a-can, Sevin Nyne tanning mist.

Melissa Arseniuk writes about Las Vegas entertainment and celebrity events. She can be reached at 702-948-7823 or by e-mail at melissa.arseniuk@lasvegassun.com.