Mackenzie Phillips, who has long battled substance abuse problems, was arrested at LAX yesterday for alleged possession of heroin and cocaine.  At 10:00 AM, officers responded to Terminal 4, where 48-year-old Phillips was being screened by TSA. During the screening process, some baggies and balloons believed to contain heroin and cocaine were recovered.

Mackenzie's half-sister Bijou Phillips tried to bail her out later that night but Mackenzie refused her money, saying that she'd rather just stay in the cell. Sad.

Let's take a look at Mackenzie in happier times.  Check her out at a fan convention in May.  Mackenzie is best known for her role of Julie on 70s classic One Day at a Time.

Oh Sam Ronson, you were far from the first.  Courtenay Semel, the daughter of a Yahoo! founder, is now reporting that she and Lindsay Lohan were not just friends but lovers, way before Sam came on the scene. 

According a story by News of the World, Courtnay and LiLo had a close relationship but it stayed hidden. “At the time she was terrified her career would be over if she revealed her sexual tendencies But then Samantha came on to the scene and I was dropped.”  

The pair met a party in Malibu in 2006.  Here we see the pair partying in Capri, Italy at the end of last year, so their friendship was definitely recent. The two became party pals and would hit the clubs together. “Both of them would do lines of cocaine in the toilets then head home and fall into bed together", a source says about their friendship. 

The source also says that Lindsay's constant partying was to bury her feelings of attraction to Courtenay and of course that landed her in rehab.  During her stay at Promises, LiLo was visited by both Court and her new friend Samantha Ronson.  Sam was just a friend in those days and apparently after Lindz finished up she and Courtenay moved into a rented house in Beverly Hills.

Courtenay tried to maintain her relationship with Lindsay, but Lindsay kept bringing men home and Court became fed up and moved out.  About a week later SamRo was on the scene! 
The pal added: “Courtenay still can’t understand how Lindsay is now so open with Samantha.  Every time she sees a picture of them together it kills her.”

Well, luckily Court has moved on, into the much more stable arms of reality star Tila Tequila; so take that Lindsay!  We need to get these four at an event together, now that would make for some good reality television.

   

Oh poooor Sienna Miller!  The paps are really giving it to her as she walks through LAX yesterday.  Check out the flood of questions, everything from "Are ready to be a mom?" to "How do you feel about people calling you a home wrecker?"  (I bet she feels great about it!) This girl certainly knows how to put herself in high profile, controversy-causing relationships!

Or maybe I should say she finished it. Why would you mess with Lily Allen?  She doesn't really seem like the type of gal you wanna f--k with but last night someone made that mistake.  Lily (who was looking hot in a purple dress) and a friend were leaving Ronnie Scott's Jazz Club in London  when a passerby in the crowd started taunting her.  Sources say that at first Lily tried to ignore the girl but she was persistent and would not stop harassing her so Lily snapped.  Apparently Lily made contact with the anonymous aggressor and punched her about three times before the scuffle was broken up.
It's a shame when someone has to ruin your night like that, but at least it makes for good song material, right?

      

Lindsay Lohan is coming to her sister's defense saying that 14-year-old Ali did not get breast implants.  Rumors had surfaced that Ali may have went under the knife after she was spotted with a fuller bust line a few weeks ago.  When some photographers in Los Angeles asked Lindsay if the rumors were true Linds got pissed and took it to her MySpace blog.

In an entry entitled "Are They Real???"  Lindsay states-
hey everyone..
i just had to share something that came up today and it made me feel a bit sick to my stomach...me and my friend Patrick walking into a store, and two paparazzi come up out of nowhere (like usual) and start throwing questions at me...one of them being, "Hey Lindsay, what do you have to say about people commenting on your sisters implants?"
WOW!!!!!!!!!!!!!!!!!!!!!!!! my response simply was, "Did you really just ask me that? She is a 14 year old girl, and you are a pedophile!"

LiLo goes on to say-
All i am trying to say is, is that, i was raised with a wonderful family surrounding me, of course we have our ups and downs, but all in all my mother taught us to appreciate what we have been given. Nor would she ever encourage, or allow a 14 year old child to alter her body.
i am not judging people that do, but i am just saying that its not something that my family finds necessary to do, especially when you're not even fully developed yet!

So Ali didn't get implants, duh.  A 14-year-old with giant boobs over night is pretty much the result of someone going a bit overboard with a set of chicken cutlets and a push up bra from Victoria's Secret.  I think the bigger picture here is that Ali is constantly trying to look older than she is and her momager Dina seems to not mind (that is until the negative press surfaces).

Did John Mayer dump Jennifer Aniston?  Has Jennifer Aniston already moved on? The Mirror is reporting that John gave Jen the boot because he wasn't ready to give Jen the kind of commitment that she wanted.  Sources say that although Jen didn't want kids or marriage immediately, it was something she wanted in the future and hoped that John would be able to cut down on his tours and settle into that kind of domestic bliss.

A source says that, "They have spoken on the phone since the split and are trying to remain on good terms. But unless John has a dramatic change of heart, it's unlikely they'll rekindle their romance."

John recently took a vacation to Mexico without Jen, who has been spending her time with girlfriends in LA and possibly someone else!  Despite being heartbroken over John, The Daily News hints that she has a new man in her life; that was fast! 

I wish you the best Jen, you've gotten the fuzzy end of the lollipop for years and it's time you've had some luck in love.

Hayden Panettiere's parents went for a walk with their dogs in Los Angeles yesterday, despite the fact that Hayden's dad Alan had been arrested the night before on domestic abuse charges.  A call was placed to the cops at 3 a.m. on Monday morning from Hayden's mom Lesley, claiming that Alan had struck her on the cheek several times after they got into an argument.  However, Alan was released on bail and claims that the incident was "blown out of proportion" and "was really nothing". 
Alan and Lesly had been at the Whaleman Foundation dinner at Beso restaurant hosted by Hayden earlier that evening and sources say both were intoxicated when they left.  Geez, talk about embarrassing parents!

    

"Hey babe, do you like my new red t-shirt?  It's got a giant A right in the middle!!!"
Class act Sienna Miller and her latest conquest Balthazar "I swear we were separated" Getty have surfaced in California.  The pair shopped for clothes and hung out with Sienna's mom (oh, so she's in on it too)...somewhere Rhys Ifans is crying gently in a corner.

     

A club employee has confessed to the murder of Ingrid Rivera, the 24-year-old woman who was found dead after Lil Kim's birthday party.  Sources said Rahman Syed, 24, a a bar back at Spotlight Live where Kim's party was held last weekend admitted that he killed Rivera who had been kicked out of the party at for being drunk, sources said.

Syed let Rivera back into the party and then lead her to the roof.  The two had an argument which resulted in Syed beating Rivera to death with a pipe.  The source of the argument in unclear, however earlier in the night another woman had complained she had fought off his sexual advances on the roof.

Lil' Kim's spokesman, Ronn Torossian, said in an e-mailed statement that Wednesday night was "the first (she) has heard of this matter."

Sienna Miller has surfaced in Los Angeles despite the fact that she is steadily gaining the reputation as Hollywood's #1 home wrecker.  Well, she's not bothered by that, clinging to the fact that Balthazar Getty and his wife were separated when they got together.

A friend tells Page Six, “It’s just annoying that all this misinformation is out there. He should’ve announced his separation a lot earlier than he did - she was always told he was separated. There’s no way she would ever get involved with another married man after Jude Law.”

Yes, "misinformation"...you just tell yourself whatever you need to make it through the night, Hester.