Mackenzie Phillips: I Slept with My Own Father  —  “Don't hate my father,” Mackenzie Phillips tells PEOPLE.  —  But in a tell-all book out Wednesday, the former childhood actress reveals that her dad, musician John Phillips of the '60s band the Mamas and the Papas, engaged with her in a long-term incestuous relationship.

K-Fat will Become K-Fit — on Reality Show  —  Looks like Kevin Federline is tired of all the K-Overfed jokes — because TMZ has learned he officially signed on to do the next season of “Celebrity Fit Club.”  —  Federleezy has packed on the pounds of late — see Exhibit XXL above — but he's on a mission to reduce the rolls.

Sarah Michelle Prinze and Freddie Prinze Jr. Have a Girl!  —  Sarah Michelle Prinze and husband Freddie Prinze Jr. are parents, PEOPLE has learned exclusively.  —  The couple “welcomed their daughter Charlotte Grace Prinze on Saturday, Sept. 19,” says a rep for the actress.  “The family is over the moon.”

Jaclyn Smith Alive and Well!  —  Honduran media reported earlier that Jaclyn Smith was rushed to the hospital, the victim of an apparent suicide attempt.  El Heraldo, a local newspaper, which first broke the news, is now reporting that it was NOT Jaclyn Smith who was taken to the hospital …

The Rumors Are True!!!  —  Hi dolls.  I'm thrilled to finally be able to tell you that the news is true... Lamar and I are getting married on Sunday!!!  I couldn't be happier and I'm so excited that I can finally share the news with all of you.  —  Your well wishes have meant the world …

Diablo Cody adapting ‘Sweet Valley High’  —  “Sweet Valley High” filtered through Diablo Cody?  —  That is exactly what Universal is doubling down on, in negotiations to pick up the rights to the long-running book series, with Cody attached to adapt.  Cody also will produce with Mason Novick as well as Marc Platt.

Fincher Makes Facebook Connections  —  Columbia Pictures and director David Fincher have set its core cast for “The Social Network,” the Aaron Sorkin-scripted drama about the formation of Facebook.  —  Jesse Eisenberg will play founder Mark Zuckerberg, Justin Timberlake will play Sean Parker …

Producers acquire Meyer's ‘Host’  —  Trio use own money to buy screen rights to novel  —  Producers Nick Wechsler, Steve and Paula Mae Schwartz have used their own money to acquire screen rights to “The Host,” the first adult novel written by Stephenie Meyer, author of the “Twilight” series.

EXCLUSIVE: Ellen Pompeo Welcomes a Baby Girl  —  Meredith Grey is a mom!  —  Grey's Anatomy actress Ellen Pompeo and husband Chris Ivery have welcomed their first child, a girl, her rep tells Usmagazine.com exclusively.  —  “Her name is Stella Luna Pompeo Ivery,” her rep tells Us.

Travolta ‘arrives at court for extortion trial’  —  John Travolta has arrived at the trial of two people accused of trying to extort $25 million from him in the wake of his son's death, says The AP.  —  The defendants have been accused of attempting to blackmail Travolta …

Lamar's Baby Mama on Khloé Nuptials: “I Thought It Was a Joke”  —  If you think you're surprised by Khloé Kardashian and Lamar Odom's upcoming quickie wedding on Sunday, imagine how the groom's ex-fiancée must feel.  —  Odom, 29, began dating Liza Morales when they were both just 17 …

Drew Barrymore's Still Working Out Mother Issues  —  Drew Barrymore's got it all - except a good relationship with her mother.  —  “I am okay with my dad, but my mom and I have yet to work it out,” Barrymore, 34, says of her mother, Jaid, in the October issue of InStyle, out Friday.

Did Howard K Inject Anna Nicole Smith?  —  Two former nannies who worked for Anna Nicole Smith have come forward, in light of the huge drug bombshell just announced, to report that they both saw Howard K. Stern and Dr. Khristine Eroshevich inject drugs into Anna Nicole.

Jessica Simpson, Do Not Read This!  —  If being single and losing her dog to a coyote weren't bad enough for Jessica Simpson, she now has to find out her ex-husband is getting back together with his ex-girlfriend.  —  Nick Lachey and Vanessa Minnillo have been on a total PDA parade for the last three days (and nights!) in Las Vegas...

EXCLUSIVE: Jon Gosselin's Girlfriend Gets a Boob Job!  —  Jon Gosselin “soul mate” Hailey Glassman went under the knife for breast surgery on Sept. 16, Star magazine is reporting exclusively.  —  “Hailey's been very self-conscious about her breasts,” a friend told Star.  “She didn't like the way they looked.”