The Daily Mail reports that the nightclub was mobbed by hundreds of fans and photographers as Ronson’s set loomed. Among the throng was Best, 27, who was intent on saying hello to his former flame and her new love.

However, an insider reveals, “Lindsay was horrified when she found out Calum was there and refused to talk to him. Samantha gets jealous of her former male lovers, and Lindsay didn’t want to upset her.”

Plus, things have tended to get a little sloppy for Linds, 22, when she runs into Best in nightclubs.

Even so, given the fact that Best was the one who turned Lindsay toward female companionship (or so he claims), Ronson, 31, might have at least wanted to offer him her heartfelt thanks.

Still, it can’t be easy for Lindsay to avoid her substantial romantic past and get on with her life.

It’s enough to drive a girl crazy.

Take one part Lindsay Lohan, one part Calum Best, and one part surly gay DJ. Add copious amounts of alcohol and mix vigorously.

Apple Lounge had its grand opening in West Hollywood Thursday night.

Of course Lindsay was there, along with constant companion, Samantha Ronson.  Also in attendance: Former Lohan beau Calum Best, who’s been in Los Angeles filming a reality show about trying to stay chaste in the face of constant temptation. Lohan has allegedly been looking to hook up ever since he hit town.

Was a sloshed, phallus-deprived Lindsay Lohan enough to break Calum’s resolve? Sam certainly didn’t look too happy as her lady-love reeled her way through the night.

Better watch out, Calum; Sam’s really been pumping up lately, and she doesn’t seem like the type who’d have reservations about hitting a guy.

Check out video of LiLo and Sam’s Apple appearance below:

Oh well; hopefully Sam found something else to do while Lindsay caught up with her ex.

Observers haven’t seen LiLo this happy and head-over-heels in a long time. She may be getting ready to finally settle down. It’s been a long and tough journey through the meat market for the poor girl, and it’s time to let go of her past.

But here’s a trip down memory lane with the Top 10 Lohan Hookups! The lucky fellows are ordered from oldest to most recent encounters.

Let’s hear your opinions in the comments; who are you most surprised about?

Britain’s Daily Mail reports that celeb spawn Calum Best is secretly texting the rehabitué, whom he volatilely dated in 2007.

“Calum can’t wait to see Linds—whenever they meet they always get it on,” says the paper’s source. “Lindsay couldn’t get enough of his bedroom antics.”

Best’s bedroom antics include being snagged hoovering coke with two hookers just a week after he and Lindsay broke up.

Best is in Los Angeles filming Totally Calum Best: The Best Is Yet to Come. The premise of the show has Best abstaining from sex for 50 days, as his friends try to trip him up with tender traps. Each week Best will undergo a lie-detector test to see how he fared.

Is the always sexually charged Lindsay Lohan part of the plan to ensnare Calum?

If Best wants to win the 50-day bet, he and Lindsay will just have to find non-carnal ways to pass the time—if they get together.

Like mocking Samantha Ronson behind her back.