LETO'S LOONEY AT SUNDANCE  —  JARED Leto was in a foul mood at the Sundance Film Festival in Park City, Utah, on Saturday night.  Leto, who was promoting "Chapter 27" (in which he plays John Lennon's assassin) picked fights with photographers and clubgoers in the VIP section of Tao at Harry O's.

LESBO 'LIP LOCK'  —  JENNIFER Aniston is very close to her best friend, Courtney Cox Arquette - and she's about to get even closer.  Aniston is guest-starring in Arquette's FX show, "Dirt," playing her archenemy, a rival tabloid editor.  But even better, according to Michael Ausiello of TVGuide.com, "Aniston's character is a lesbian.

Anna Nicole to Birkhead — Go F**k Yourself  —  TMZ obtained an AOL Instant Message exchange yesterday between Anna Nicole Smith and Larry Birkhead.  Anna Nicole made it clear that she's not going to submit to a DNA paternity test without a fight.  —  The following is a precise transcript …

Jessica Simpson & John Mayer Hit Miami  —  Three weeks after getting cozy in New York over New Year's Eve, Jessica Simpson and John Mayer made another cute-couple appearance, this time in Miami.  —  On Monday, the pair worked out together at their hotel's Sports Club/LA gym …

So Much For Tara Reid Cleaning Up Her Image  —  Tara Reid , Exclusives! , Film Festivals , Music & Movies  —  Park City Utah got a special treat on Monday night when Hollywood "Party Girl" Tara Reid got humped on stage by rapper Akon during his performance of "Smack That"

Cruise 'is Christ' of Scientology  —  TOM Cruise is the new "Christ" of Scientology, according to leaders of the cult-like religion.  —  The Mission: Impossible star has been told he has been "chosen" to spread the word of his faith throughout the world.  —  And leader David Miscavige believes …

Paris and Jenna to Show Virgins the Ropes?  —  When you think of Paris Hilton and Jenna Jameson, the last thing you probably think is ... virgins.  —  And yet, sources tell TMZ that famed on-camera sexhibitionists Hilton and Jameson have been contacted about "participating" …

BAND OF GOLD  —  HAVE Heath Ledger and Michelle Williams secretly tied the knot?  Last month, we reported the spotlight-shunning duo had quietly applied for a marriage license in Brooklyn, where they have a townhouse in Cobble Hill.  At the time, friends said the lovers, who met while filming …

Rosie to Oprah - C'mon, Fight!  —  Rosie O'Donnell is picking a fight with Oprah over the talk queen's controversial interview with kidnapped teen Shawn Hornbeck.  Lots of people are outraged, and many are screaming exploitation.  But will O v. Ro turn into another Trump-scale nuclear conflict?

POURS IT ON LIKE A FOXX  —  JAMIE Foxx doesn't mess around when he plans his parties.  For the after-bash follow ing his "Unpredictable" show at Marquee last night, the Oscar winner requested Bel vedere, plastic pour spouts and pre-made, hot-pink, sex-on-the-beach mix.

Naomi denying Brazil sect's appeal  —  The Dreamgirls themselves - Anika Noni Rose, Beyoncé and Jennifer Hudson - sparkled at the film's U.K. premiere.  —  Naomi Campbell called yesterday - no jokes about flying cell phones, please.  The supermodel was a perfect lady …

Breaking!  Washington's Grey's Days May Be Numbered  —  Isaiah Washington may be on his way out.  —  I just received word from a highly placed source within the Touchstone/ABC family that ABC and Disney executives are currently considering the option of firing Isaiah Washington from Grey's Anatomy …

Mandy and AM Swap Spit in Public  —  Yep, it's true: Mandy Moore and DJ AM are celebdom's newest couple, and TMZ has the first photo of them smooching, right out in the open at the Sundance Film Festival.  —  Sources close to both Moore and AM (real name: Adam Goldstein) confirm to TMZ that the pair is "definitely" a couple.

CHEF IN STITCHES, NOT FROM JOKE  —  VYING for the title of TV's "Top Chef" can be hazardous to your health.  Just ask Marcel Vigneron, who ended up with a big scar over his left eye.  "This girl came up to me at a nightclub and asked me if I was Marcel from 'Top Chef,' " Vigneron, 26, tells Las Vegas Weekly.

It's A Sunshine Day  —  Today is my last half day here in Detroit for a while ... I won't be back at least until sometime in March so I'm gonna try and enjoy it as much as I can (all this LOVELY snow and the bitter cold temperature is really hard to leave) while I can.

Rehab, Hollywood Style  —  While we'd never dream of pretending to know how to treat an addict better than the folks who run rehab centers, some of their decisions do leave us scratching our heads - like hosting an AA meeting at the Key Club!  But then again, when you're dealing with celebrities …

Tori Ready For Baby  —  Having a baby doesn't mean you have to dress like one!  A very preggers Tori Spelling went out looking downright childish in pig-tails and a baby-doll.  Tori does look like she's in great shape for being as pregnant as she is (baby's due this spring) …

A chat with ... 'Veronica Mars' star Jason Dohring  —  The wait is almost over.  —  Veronica Mars fans are counting down the hours until the CW series returns with new episodes tonight at 9 p.m. ET.  This time around, the plot focuses on the mysterious death of Dean O'Dell — and …