What Tina Wants  —  Tina Fey has rules.  They've guided the 38-year-old writer-comedian through marriage, motherhood, and a career that went into hyperdrive this fall, when her Sarah Palin impression convulsed the nation, boosting the ratings of both Saturday Night Live and her own NBC show, 30 Rock.

Simon Cowell: Britney Spears Is in Awe of Me  —  Britney Spears won over one of America's toughest critics with her string of comeback performances last week: Simon Cowell!  —  As part of a promotional tour to tout Tuesday's release of her new album, Circus, Spears, 26, performed “Womanizer” on Cowell's X-Factor Saturday.

Ivana Trump separates from fourth hubby Rubicondi  —  NEW YORK - Ivana Trump has issued a statement confirming reports of marital discord with Italian entrepreneur Rossano Rubicondi.  —  Trump, who married Rubicondi in April, says she filed a legal separation agreement three months ago.

So Plaxico Burress Walked Into a Bar...  Details are coming together about what happened after Giants receiver Plaxico Burress pulled a Suge Knight on Friday night and accidentally shot himself in the leg at the midtown club Latin Quarter.  The Post reports that a series of efforts to hide the injury …

Madonna & A-Rod Head to Mexico City  —  Photo by: Ronald Asadorian / Splash News Online; Pascal Le Segretain / Getty  —  Coincidence?  —  Madonna and Alex Rodriguez were both spotted in Mexico City last weekend.  —  The two have not confirmed their romance.

Ricki Lake: 'I Can't Believe I Was Fat'  —  Ricki Lake has trimmed 140 lbs. from her all-time top weight of 270 pounds - and says she is holding steady.  —  “I can't believe I was a fat person for most of my life,” the former talk show host, rocking a sexy black Herve Leger dress (size small) …

Travis Barker and DJ AM to reunite for performance  —  LOS ANGELES - Punk musician Travis Barker and celebrity disc jockey DJ AM will perform together for the first time since the duo survived a fiery plane crash in South Carolina.  —  The former Blink-182 drummer and DJ AM …

Brad Pitt: The Best Meal Angelina Jolie Has Cooked for Me Is Cereal  —  Don't expect Angelina Jolie to whip up a fancy dinner for her six kids and beau Brad Pitt.  —  In the new issue of chef Jamie Oliver's eponymous magazine, Pitt, 44, admits the best meal Jolie has ever cooked for him was “cereals,” according to the U.K. Guardian.

EXCLUSIVE: ER Star Parminder Nagra Pregnant With First Child  —  ER star Parminder Nagra and her photographer beau, James Stenson, are expecting their first child this summer, the actress confirms to Usmagazine.com exclusively.  —  “We are thrilled and overjoyed at the prospect of becoming first time parents,” Nagra tells Us.

Kate Hudson: ‘I Stalked A Man’  —  Kate Hudson once stalked a man she was desperate to date, and even recruited her friends to help her track the unwitting suitor down.  —  The single star confesses she was so obsessed with an unnamed bachelor, she tried to manipulate meetings in the hope he would ask her out.

Downey Jr. Knocked Out on ‘Holmes’ Set  —  A freak accident on the set of Robert Downey Jr.'s latest movie was less ‘Iron Man’ and more iron chin.  —  The Sun reports that Downey Jr. was knocked unconscious when a 350-pound stuntman accidentally punched him during a scene they were filming …

Britney had ulterior motive for TV special  —  Plus: O'Donnell on variety-show flop; Travolta says Hanks owes him  —  “Britney: For the Record” might offer an inside glimpse into the pop star's life, but offering up tidbits about her failed relationship with Kevin Federline wasn't the goal of the documentary.

Orlando Bloom and Miranda Kerr Are Not Engaged  —  Orlando Bloom and Victoria's Secret model Miranda Kerr aren't engaged, his rep tells Usmagazine.com.  —  Australia's The Sunday Telegraph had reported that a wedding was planned for the middle of next year, “when both have a break from work commitments.”