Just seconds after the Supreme Court lifted a ban on gay marriage, Ellen Degeneres announced that she and Portia de Rossi were engaged.

“She’s taught me lessons about myself, and I feel like I’ve taught her,” said the TV host. “We’ve both changed and grown, and we just feel like, ‘Oh, okay, this is completion.’ ”

Shania Twain announced that she was separating from husband Robert Lange. She reported problems as early as 2000, but they’d been trying to work things out. Sadly, no go.

Is it a new romance? Britney Spears and Mel Gibson are going off to Costa Rica together!!!!

Aaah, but they’ll be with Britney’s dad and Mel Gibson’s wife, too. They’ll be staying in Gibson’s home in Costa Rica.

Actually, they’ve been meeting up a lot over the last few months. They used to be neigbors in Malibu. “Mel and his wife Robin clearly saw a woman in crisis and wanted to extend themselves in any way possible,” the source said. “It’s simply an act of human kindness – one neighbor reaching out to the other.”

Lindsay Lohan on the set of Ugly Betty. No, the shorts isn’t her new fashion look — the scene’s supposed to be at a gym. She’ll be part of a flashback to Betty’s high school days.

Uma Thurman on the set of Motherhood, her latest film. Here she plays a harassed mom who completely gets overwhelmed while planning her daughter’s birthday party.

Angelina Jolie looks absolutely glowing at the Cannes Film Festival. Her twins are due August 19, or so her “Kung Fu Panda” co-stars reveal. The mum’s been “keeping mum” on the pregnancy herself.

Emile Hirsch is shopping for a new talent agency. Can’t blame him — his latest movie, Speed Racer, was a box office flop. And given how harsh Hollywood is, he could lose his 60 minutes of fame if he doesn’t make smart career moves. (Hirsch who?)

The American Idol producers are defending their decision to ban David Archuleta’s dad. Though people from David’s camp says it’s to give contestants a fair advantage, they say it’s really about cutting the singer some slack. “Let’s take some pressure away here,’ you know? It’s like anybody appearing in front of their mom and dad. Let’s just open up the pressure cooker, release the pressure, and you just get on and do what you gotta do.â€�

The Jennifer-John lovefest continues. After a romantic weekend in Orlando,
Jennifer Aniston and John Meyer met up once again. She visited him at back stage at his concert, where she happily played the fan and took pictures of him. Then, she gave him a looong kiss before he played an encore. After the concert, they headed for the hotel and got cozy by the poolside.

Oh, true love.

Blake Lively and Penn Badgley have avoided confirming any gossip that they’re an item, but this picture says it all. They went to Paraiso de la Bonita, a Mexican luxury resort, last weekend — and we bet it wasn’t to talk about Gossip Girl’s latest script.

Britney’s dad banned her from using the car, and we’re starting to understand why. She got into another fender bender (her insurance company’s probably not yet even done processing the lst one, which happened in April). But she was nice about it, even inviting her new “victim” into her home to exchange information.

Hulk Hogan’s son, Nick Bollea, gets 8 months of jail time, 5 years probation and 500 hours of comunity service for reckless driving, which led to a car crash that left his best friend, John Graziano, in critical condition.

Nick looked somber as he told the Grazianos: “I will never ever be able to say I’m sorry enough.” He was led away by the police after the ruling, and was not allowed to say goodbye to his parents.

The Vanity Fair scandal certainly got Miley Cyrus thinking. “We’re all changing,” the 15-year-old Cyrus told a screaming crowd Saturday onstage at KIIS-FM’s Wango Tango concert in Irvine, Calif. “I thank you for helping me as I grow through that.”

Sometimes we forget that even if she’s a star, she’s just a kid — and kids make mistakes. Even Tyra Banks has rallied to her side, saying that “she’s just 15″ and there are many requests from people who will try to take advantage of her. Sometimes it’s the adults surrounding teen stars who’ll have to play mediator, Banks hints, saying her own mom once nixed a request for her to pose nude.

K-Fed’s attorney, Mark Vincent Kaplan, admits that Britney’s made “great progress” — on all fronts. She was given longer visitation hours, and even had 2 full days with them last week (May 8 and Mother’s Day). He even hinted that she and Federline are on better terms, although no reconciliation is in sight. They just want to be good parents for the kids. Now that’s good news. Britney’s meltdown is over, and she’s back where she’s needed most — in her boys’ life.

John Meyer and Jennifer Aniston look like they’re having a very private conversation… exchanging sweet nothings, perhaps? The two have been sighted together very frequently, and seem very much in love.

Congratulations to Jenna Bush and Henry Hager! The two just got married in her hometown, though one could hardly call it a private affair. Social Security personnel kept out the crowds, while strangers crowded the streets hoping to get a peek at the President. Oh well.

Alanis Morisette, best known for her angsty songs, has plenty of new emotional material now that her ex is engaged to Scarlett Johanssen. The two broke up years ago, which she reveals, caused her to
hit rock bottom. But she’s okay now, and with a CD that chronicles her climb back to sanity. If life is fair, she’ll get a Grammy for her pain.

Lindsay Lohan’s been accused of stealing! First by a Columbia University student who says the actress swiped her fur coat, now by model Lauren Hastings, who says she lost several thousand dollars’ worth of clothes. She reported it to the police who dropped the case because of insufficient evidence.

We know Lohan hasn’t been getting as many projects — her rehab problem really dragged down her career — but is she so strapped for cash she can’t buy her own things?

Another celebrity marriage bites the dust. Liv Tyler and British rocker Royston Langdon have gone their separate ways, although they claim they’re “still friends” and that they plan to be “devoted parents” to their son Milo, who was born in December 2004.

Yeah, we’ve heard that before.

Uma Thurman is suing Lancome. Her contract with the cosmetics giant expired years ago, but her name and face appeared on Canadian billboards and Asian Web sites after her contract had expired in 2004.

But here’s the surprise. Lancome is countersuing.

So it’s off to the courts, and we can bet that they’re not just going to kiss and “makeup.”