The aliens have landed and they have very white teeth and big coifs.

The summer of 2007 may be the final stage of Hollywood invading the Hamptons. On the once sleepy East End, real-estate prices are now unreal. And as stars and press are out in record numbers on the East End, a kind of tipping point seems to have been reached, where there is an unbridled mad rush of stars to just about any town with Hampton in the name.

On Friday, at Anne Hearst and Jay McInerney's house, that was Rick and Kathy Hilton, looking hot on the porch at Ashgrove Farm in Watermill. The Hiltons have not sold their house in Southampton, says Kathy.

Meanwhile Hearst and McInerney's house is beautiful, designed by Peter Cook to look like the original ranch house at San Simeon. And Kim Raver (very pregnant) and Brooke Shields were sitting on the back porch. Hotelier Andre Balasz was hanging out with Candace Bushnell.

McInerney gave this writer an art tour, and not only do they have a video portrait of an owl by Robert Wilson, but I was also introduced to Wilson himself.

The tony fete was for Princess Yasmin Khan's Rita Hayworth Alzheimer's Foundation. Fun.

On Saturday, Christie Brinkley showed up for batting practice at the Artists' and Writers' softball game in East Hampton. Man, does she know how to pose. With bat and ball, she struck, like, 11 different poses in four minutes. And she also mananged to drive a number of softballs out by second base when up at bat. The whole time she was dogged by at least 30 photogs.

At Bridgehampton Polo that afternoon, Donald Trump and Melania took over the VIP tent with Miss Universe, Miss USA, and Tara Connor, back from rehab and looking fine.

Star Jones stopped by for that photo op. And even she looks sensational. The bypass surgery and new job are clearly working for her. She was wearing Missoni and looked thin but not too thin. Her court TV show begins Monday.

Trump was celebrating "Pageant Place," his new show on MTV, as well as Trump on the Ocean, a new wedding and bar mitzvah venue he is building at Jones Beach. Yup - insert big Oy Vey here - he's now in that business, too. And his people did up the VIP tent like a wedding with sushi and beef on potato chips with pesto. Yum.

That night Jake Paltrow's, Gwyneth's brother, premiered his film "The Good Night" in East Hampton through the Cinema Society. Ed Burns; Christy Turlington; Brinkley (now in a white Ralph Lauren dress); Chris Martin, looking very scruffy; Gwyneth (wearing Stella McCartney); Stella McCartney, with her husband; Barbara Walters and tons and tons of other stars showed up. Paul McCartney came very, very late; he was home trying to get the baby to bed.

Dinner was at Ron Perelman's historic estate, The Creeks, but he doesn't like to have press around, so this writer didn't get that invite. But we hear that Mariah Carey and Jon Bon Jovi showed as did Shields and loads of celebs from the screening.

Jake's movie is about a guy who dreams about a woman (Penelope Cruz) and then works to try to get that dream back because he enjoyed it so much. Gwyneth said that she is loving spending the summer at her own house with the kids.

At the Estate (owned by the owners of Tenjune a Manhattan nightclub), Molly Sims hosted a party with Perrier-Jouet, where art was the theme. They had an terrific artist painting canvases before a large audience. Sims, in a flowing white dress, was there with her youngish boyfriend, Justin Chatwin, who played Tom Cruise's son in "War of the Worlds." This hot couple have an effortless hippie style.

Sims was later spotted at Pink Elephant in Southampton. Jones partied on with a niece and young cousin at Stereo by the Shore, and at Dune, Grand Master Flash was standing near the DJ booth with owner Noah Tepperberg at 3 a.m.

Meanwhile, my houseguest ran into Cynthia Nixon and her gal pal at the hardware store in East Hampton that afternoon. And Bon Jovi and his wife and child passed them on the street moments later.

Yeesh, the Hollywood types are everywhere. And they are multiplying. And when they read in the tabloids about their famous elegantly-styled friends having fun in the sun, get ready for an even bigger Hollywood infiltration soon.

- JEFFREY SLONIM