NATIONAL ENQUIRER EXCLUSIVE: PNEUMONIA KILLED ANNA NICOLE SMITH, PRELIMINARY FINDINGS INDICATE  —  Pneumonia — not a drug overdose — killed Anna Nicole Smith, the National Enquirer has learned exclusively.  —  In the new issue just hitting newsstands, The ENQUIRER reports …

Brit's Lost Weekend Before Rehab  —  Before checking in to Promises rehab center in Malibu for the second time, Britney Spears enjoyed a strange, bewildered day with two new friends.  —  Bright and early on February 17, a newly bald Spears arrived at L.A.'s chic Mondrian hotel, ready to catch some rays.

Paris Violates Probation, Could Face Jail Time  —  TMZ has confirmed that Paris Hilton violated the terms of her probation last night when she was arrested for driving on a suspended license, and could spend up to 90 days in jail as a result.  —  Hilton pled no contest to alcohol-related reckless driving …

Vincent Pastore Drops Out of Dancing with the Stars  —  Vincent Pastore will not appear on ABC's Dancing With the Stars when the hit show begins its fourth season on March 19, the network announced Wednesday.  After one week of training, the 60-year-old actor said the strenuous nature of the competition was just too much.

Kevin's Side of the Story  —  Britney Spears's current rehab stint has already had one positive outcome — Kevin Federline's transformation into Super Dad.  —  A source close to the former back-up dancer says he's currently put his life on hold while he works overtime to care for his two sons …

'Grey's Anatomy' stars fuming over spinoff  —  Plus: Is Nicole Richie about to get engaged?  —  Addison Montgomery (formerly Montgomery-Shepherd, as she was married to McDreamy), is getting her own "Grey's Anatomy" spin-off, and not everyone is happy for her.  —  More troubles on the set of "Grey's Anatomy."

'Idol' chatter dominates Playboy bash  —  HOLMBY HILLS, Calif — More and more, it seems, the pasts of young reality star hopefuls are threatening their shots at stardom.  American Idol contestant Antonella Barba, 20, has become the latest to don the scarlet letter as photos of her with her top dropped …

Shiloh and Maddox Take a Ride with Grandma Pitt  —  Source  —  Shiloh and Maddox Take a Ride with Grandma Pitt  —  With Angelina in Africa and Brad hard at work on The Curious Case of Benjamin Button, Grandma Pitt is getting some serious quality time with the kids.

Why Brangelina Blew Off The Oscars  —  Angelina Jolie, 31, has no time for double-stick tape and a pair of Spanx on Sunday night.  —  The Goodwill Ambassador blew off the Oscars to travel to Africa where she immediately got down and dirty in the mud of a refugee campsite.

Diaz and Aniston Discuss The Guy Who Did Their Nosejobs  —  Cameron Diaz and Jennifer Aniston had a plastic surgery-klatch about the dude who worked rhinoplasty miracles for them.  I don't see a difference.  But I'm sure when you're a neurotic Hollywood-type, a miniscule shaving of flesh can make you a new woman.

BRA-VO HELEN: CHEERS AT AIRPORT  —  SHE'S GIVEN A STANDING OVATION AT THE AIRPORT - AND ADMITS SHE WORE NO UNDERWEAR AT THE OSCARS  —  HELEN Mirren was given a rapturous welcome back to Britain yesterday - after revealing she wore no undies on her Oscar glory night.

Arkin gets 'Smart' for Warners pic  —  Oscar winner Alan Arkin is reuniting with his "Little Miss Sunshine" co-star Steve Carell in the big-screen version of "Get Smart," which Peter Segal is directing for Warner Bros.  Pictures.  —  Arkin will play the chief of CONTROL, the organization that fights the evil forces of KAOS.

Lindsay Lohan's Future Is Shaky  —  Lindsay Lohan made sure she didn't miss out on the post-Oscar partying - but admitted it gave her "the shakes".The 20-year-old actress is fresh out of a 30 day stint attending rehab for alcohol dependency, but has got straight back into the LA party scene …

Cameron Diaz is Paranoid  —  You know, "smoking grass" has been attributed to some serious stuff like making people sleep too much, laugh too much, procrastinate too much, sleep too much, laugh too much, procrastinate too much, forget too much and "Reefer Madness."

ANNA NICOLE'S DIARIES FOUND  —  I have just seen Anna Nicole Smith's di aries.  I held them in my hands.  They encompass 1992-1994.  One simple in expensive booklet said: "Vickie Smith, Do Not Read."  One was a purse-size spiral notebook with blue-lined pages.  One was inscribed "Guess Jeans."