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.

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 …

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 …

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.

A New Man for Kate Walsh  —  Kate Walsh seems to have moved on from her divorce to film executive Alex Young - she attended the Emmy Awards Sunday with new beau Neil Andrea.  But the Private Practice actress isn't about to kiss-and-tell.  —  When asked about her hot date, Walsh told PEOPLE, “I'm not going to talk about that!

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.

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 …

Travolta First Witness — Smoking Gun to Follow  —  We've learned John Travolta will be the first witness called today in the extortion trial over his son's death — and after John steps down from the stand, there will be a legal dogfight in the courtroom over what could be the smoking gun in the case.

GO BEHIND THE SCENES OF MY PREG PHOTO SHOOT WITH J SQUARED!!!  —  Hi everyone!!!  The other day i did a photo shoot with my faaaavorite photographers... J Squared.  I go to them for everything They're so talented and i always love the way the pics turn out.

Jennifer Garner's an Old-Fashioned Mom  —  Jennifer Garner may downplay her mom abilities, but she has no shortage of ideas about encouraging her kids to think creatively, a friend says.  —  “Every day, you feel like you are off-balance one way or another,” Garner, at Monday's Hollywood premiere …

Honeymoon's Not Over for Bruce and Emma Willis  —  They're just another married couple now, but you wouldn't have guessed it from the way Bruce Willis and new wife Emma Heming were acting in New York Monday night.  —  At the Cipriani Wall Street for Susan and Tony Bennett's Exploring the Arts Gala …

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...