Is It Over for Jen & John?

• Guess John Mayer didn't buy Jennifer Aniston an engagement ring after all. It's now rumored Mayer ended the relationship right around the time Aniston got back from her world promotional tour for Marley & Me. [E!, Us]
Tim Gunn supposedly has a "secret crush" on Anderson Cooper. He says he's been trying to set up a lunch date with the CNN anchor for more than a year now, but it hasn't happened. Yet! [OK!]
• Mandy Moore and Ryan Adams got married on Tuesday in Savannah. [Us]
• Breaking! Katie Holmes has long hair again! [DM]

Diddy is on a 48-hour "spiritual juice fast," just so you know. [Twitter]
• Chris Brown is reportedly looking to dump his management team. Equally important: He's withdrawing his name from the Kids' Choice Awards ballot. [P6, AP]
James Gandolfini canceled the matinee performance of God of Carnage yesterday so he could give his "vocal cords a rest." [AP]
Keith Olbermann was spotted signing baseball cards at a Yanks-Reds spring training game Tuesday night. [P6]
Gisele Bundchen is "ready to become a mom" and has made getting pregnant a "top priority." How sweet. [In Touch]
• You may want to take this with a grain of salt, but Star reports Britney Spears and K-Fed are "falling in love again" on tour. [Star]
• Zach Braff smokes pot! Shocking, huh? [PS]
• A Manhattan judge turned down Robert Trump's request to have his divorce from Blaine Trump heard in Dutchess County. [P6]
Dominick Dunne is undergoing "unorthodox cancer treatment" at a clinic in Germany. [Cindy Adams]
• Michael Jackson is adding 20 more dates to his summer tour. [E!]
• Bristol Palin and her baby-daddy Levi Johnston have split up. [NYDN]
• Anne Heche gave birth to a son named Atlas last weekend. [Us]
• Patrick Swayze says he's not on the verge of death, despite what you may have read in, say, upstanding publications like the Enquirer. [People]
• Mickey Rourke has signed to star in Iron Man 2. [ET]
Ivanka Trump says she finds it "hilarious" when people compare her to Paris Hilton: "It's no more obvious a comparison than between myself and George Bush." [DE]