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 …

Another Paris Driving Mishap  —  Paris Hilton and virgins don't seem to mix well.  The star went to the Virgin Megastore in West Hollywood to pick up some DVDs last night at around 10:30, when she was stopped by the cops — and her $200K 2007 Bentley Continental GTC Convertible was towed away.

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.

Could Beyonce Get Hepatitis from Wolfgang Puck?  —  An urgent warning has been issued by the Health Department, warning the star-studded crowd who attended the Sports Illustrated Swimsuit Issue party on Valentine's Day that they may have been exposed to acute hepatitis A. The list of possibly exposed guests …

Katherine Heigl Not Feeling Grey's Love  —  Katherine Heigl has dropped out of contract talks with Grey's Anatomy over salary, a well-placed source tells PEOPLE.  —  "Katie is disappointed and hurt that (producer) Touchstone doesn't value her as much as her other costars, especially Sandra Oh and Isaiah Washington," the source says.

Kevin Federline Gives Britney Spears an Ultimatum  —  Britney Spears caused a case of mass whiplash when she bolted from rehab after less than 24 hours - then checked back in days later.  The reason for the quick turnaround?  An ultimatum from Kevin Federline, a source tells PEOPLE.

Affleck, Willis on Ex-Madam's Client List  —  RECOMMENDED (0)  —  According to a former Hollywood madam, Ben Affleck and Bruce Willis have more in common than mediocre acting skills and starring roles in Armageddon.  —  In her new autobiography, Secrets of a Hollywood Super Madam …

'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 …

'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."

Family Judge: No DNA from Dannielynn  —  A Florida family court judge just rejected Larry Birkhead's lawyer's request to take a DNA sample from Dannielynn Stern, the daughter of Anna Nicole Smith that Birkhead claims he fathered.  However, the judge agreed to "help" the California judge deciding …

Sect's maniacs invade Hollywood  —  Forget Scientology and kabbala: Hollywood has a nutty new sect that is recruiting celebs.  —  "The Secret" promises "a new era for humankind" through "the secret laws and principles of the universe."  According to its Web site, this information popped …

50 senses his ex is trying to get rich  —  50 Cent has paid big money to support his son, Marquise.  But the rapper never had an official arrangement with the boy's mother, Shaniqua Tompkins, and now he's taking the unusual step of making it formal, filing papers in Family Court here under his given name, Curtis Jackson.

WAHLBERG 'CREEPED OUT' BY BROKEBACK ROLE  —  Movie & Entertainment News provided by World Entertainment News Network (www.wenn.com)  —  MARK WAHLBERG is glad filmmaker ANG LEE passed over him when he cast BROKEBACK MOUNTAIN, because the Oscar nominee was "a little creeped out" at the prospect of having to play a gay cowboy.

P. Diddy Investigated for Assault & Battery  —  TMZ has learned Sean "P. Diddy" Combs is being investigated by the Los Angeles Police Department for allegedly attacking a man at a Hollywood Oscar party.  —  Gerard Rechnitzer was at a post-Oscar bash Sunday night with his fiancee at Teddy's at the Roosevelt Hotel in Hollywood.

FROCK AT LARGE  —  CHANEL designer Karl Lagerfeld wants to know who stole one of his couture designs, a black dress with a white bib-front that he sent down the runway last month.  Courtney Love wore an exact knockoff of the frock, right down to her fluffy fingerless gloves …