Jennifer Aniston & John Mayer: Broken Up?  —  Jennifer Aniston and John Mayer may have called it quits.  —  That's the rumor I'm hearing.  A source says that the pair's on-again, off-again relationship may have ended when Aniston returned from overseas, where she was promoting Marley & Me.

Madonna Makes Surprise Appearance at Britney's NYC Show  —  Madonna made a surprise appearance at Britney Spears' sold-out show Circus show Wednesday in New York City.  —  Shortly before Spears, 27, took the stage at the Nassau Coliseum on Long Island, Madonna, 50, arrived with her manager Guy Oseary …

BROWN READY TO CLEAN HOUSE  —  CHRIS Brown is said to be through with his manager, whose sexy text-messages supposedly sparked the fight that ended with his alleged beating of Rihanna.  —  Brown is “looking for a whole new team” to replace his current crew, “starting with his manager, Tina Davis,” said our source.

Joaquin Pulled from Brawl — Pulling Our Leg Too?  —  Joaquin Phoenix jumped off the stage and attacked a fan at a Miami show last night — but, like anything with him these days, the whole thing could be one big set up.  —  It all went down at LIV nightclub at the Fontainebleau …

ANOTHER ‘IRON MAN 2’ DEAL: Scarlett Johannson To Replace Emily Blunt As Black Widow For Lousy Lowball Money  —  I've already posted my scoop that Mickey Rourke will play the Russian villain in Iron Man 2 in a Marvel Studios deal that started out lowball and went up a lot.

Third ‘Twilight’ film finds director  —  Juan Antonio Bayona will helm ‘Eclipse’  —  Summit Entertainment has tapped Spanish director Juan Antonio Bayona to direct “Eclipse,” the third pic in the “Twilight” vampire series.  —  Summit, which had no comment Wednesday, is expected to make the official announcement soon.

Rep: Anne Heche Welcomes a Son!  —  Anne Heche and beau James Tupper welcomed their first child together over the weekend, her rep confirms to Usmagazine.com.  —  Atlas Heche Tupper weighed in at six pounds, 12 ounces, the rep adds.  —  Heche finalized her divorce from ex Coley Laffoon …

Bristol Palin & Fiancé Split  —  Levi Johnston and Bristol Palin  —  Bristol Palin and her fiancé Levi Johnston have broken up, two sources tell PEOPLE.  —  The split happened “a few weeks ago,” according to a source close to the couple, but it's unclear what precipitated it.

David Hasselhoff's Ex Arrested for Felony DUI  —  David Hasselhoff's ex-wife could have used a little help from KITT from Knight Rider on Wednesday evening.  The actor's ex, Pamela Bach, was arrested for felony DUI in Los Angeles, police records show.  —  Bach, 46, was arrested at 9 p.m …

Patrick Swayze: It's Not ‘The End’ for Me  —  Patrick Swayze wants to stay positive.  —  Reacting to a tabloid story that says he's nearing “The End” (and showing photos of him appearing gaunt), The Beast star is slamming what he calls “inaccurate” reports about his year-plus battle with pancreatic cancer.

Official ‘If U Seek Amy’ Music Video  — “i knew it!  what an amazing show” —suzy  — “Hurrahy!! tha u r safe in NYC, can't wait that you come to chicago... ill” —D17th  — “Nice” —Neo  — “hi................” —hardeep  — “Madonna walked right by me!!!

Musical ‘Heathers’ headed to stage  —  ‘Witch Mountain’ helmer Andy Fickman developing prod'n  —  Get ready for “Heathers: The Musical.”  —  The influential 1988 teen dark comedy, which launched the careers of Winona Ryder, Christian Slater and scribe Dan Waters, is stagebound in a production …

Shannen Doherty Reveals She'll Be Back on 90210  —  Women of 90210, you best hold on to your men!  —  Shannen Doherty herself just spilled to us that her man-stealing character Brenda Walsh will be coming back to America's most famous zip code for the first-season finale of the CW's 90210.

50 Cent Screws Rap Rival with Revenge Porn Tape  —  2Pac vs Biggie, it ain't — but now the beef between 50 Cent and Rick Ross has reached a whole new level ... and it involves a homemade porn tape.  —  A source tells TMZ 50 Cent plans to release a porn tape featuring one of Rick Ross' baby mamas.