Katie Holmes, actress and Bride of Scientology, turns 31 today. Hard-charging hedge fund manager Dan Loeb is turning 48. Brad Pitt turns 46. Steven Spielberg is turning 63. Christina Aguilera is celebrating her 29th birthday today. Dan Klores, the publicist turned documentary filmmaker, is marking his 60th. The head of the American Federation of Teachers, Randi Weingarten, is 52. Memorial Sloan-Kettering president (and Nobel Prize winner) Harold Varmus is turning 70. Troubled rapper DMX is 39. Keith Richards of the Rolling Stones is 66. Ray Liotta is turning 55. Model agency owner Faith Kates is 52. And former Miss USA Tara Conner is turning 24 today. A bunch of weekend birthdays is below.

• Heidi Klum and Seal have a new addition to the family: Lou Sulola, who was born on Friday night and joins siblings Johan, Henry, and Leni. [People]
• Tyra Banks ought to be in a good mood today. Not only has she dropped four dress sizes recently, she's been named the "top-earning primetime TV star" by Forbes thanks to the $30 million she's collected over the past year. [Daily Mail, MSNBC]
• The latest legal tiff between Christie Brinkley and Peter Cook is over: The couple has settled their dispute, which means neither of them will be heading off to jail. [People]
• Was Penelope Cruz sporting a giant sapphire and diamond ring the other night because she really is engaged to Javier Bardem? And did she wear a bulky sweater over her dress because she's pregnant? So many questions, so few answers. Sigh. [P6, NYDN]

Tilda Swinton and Donald Trump fighting. So are Tori Spelling and Star. And, yes, even Gore Vidal and Ed Koch. But at least there's some love: Heidi Klum and Seal had baby number four. Welcome to your Tuesday gossip roundup!

Robert Pattinson whines about not getting more hot chicks, Brad Pitt is a joint-rolling artist, Kate Major says boning Jon Gosselin was "amazing," Mariah Carey disses the Grammys, Alicia Silverstone gets naked and David Cook is dating an older woman.

Finally, Mickey Rourke has met his romantic match: Bai Ling, an actress/red carpet fixture/visionary who has the ability to look at two lanyards of approximate nipple-width, then use them as a blouse.

1/2 — I turned the corner in the furniture aisle and saw DAVID COOK in the North Hollywood Target. He was focusing on looking down and texting as much as possible. [Hollywood PrivacyWatch is written by and for Defamer readers; send your sightings to tips@defamer.com.]

Remember when the music industry said MP3s on the Internet were going to destroy music? Here's an inside glimpse at how much things have changed since Napster. Today, publicists contact me to try to arrange stories about songs their clients have intentionally "leaked" onto the Internet. American Idol David Cook is the latest in a long line. David, I love your act, but next time bypass the "mobile-only social network" and upload yourself straight to YouTube. Here's the pitch, minus the name of the hanger-on tech company trying to ride along with Cook's fame:

This just in: a Hollywood PrivacyWatch Special Edition, featuring an extremely well-observed power breakfast with your American Idol, David Cook. "I saw the American Idol winner David Cook at breakfast at Belmont on Wednesday. He was having breakfast with some record execs but he was dressed in total faux-hipster. Vest over t-shirt. Check. Pork pie hat cocked jauntily. Check. Lots of necklaces outside of his tee. Check. Three (!!) of those fight breast cancer/fight something plastic bracelets on one wrist. Check. Cowboy boots. Check. He totally looked like he was dressed by someone who hates him." [Defamer AI Coverage]