Renee Zellweger visited The Late Show with David Letterman last night to promote her latest film, My One and Only, in which she plays a fading Southern beauty—a description that hardly fits the actress, who wore a vivid cobalt cocktail frock by Carolina Herrera. Zellweger told Letterman about Blue Parrot, her new East Hampton restaurant, and celebrated its Mexican fare by attacking a giant guacamole-filled piñata.

Diane Kruger appeared on The Late Show with David Letterman last night to promote Quentin Tarantino’s Inglourious Basterds, in which she stars with Brad Pitt. The German actress chatted about road trips with boyfriend Joshua Jackson, relating an anecdote about sleeping in a car. However, Kruger looked fresh as ever posing in an elegant Chanel LBD featuring a sheer top and dazzling silver detailing.

In the family comedy Shorts, a collection of interwoven vignettes, the appearance of a mysterious rainbow-colored rock with the ability to grant wishes disrupts life in a suburban community. What’s on our wish list right now? For starters, the stunningly vivid green-and-black full-skirted frock by Oscar de la Renta that Leslie Mann wore to the movie’s L.A. premiere this past weekend.

In The Time Traveler’s Wife, based on Audrey Niffeneger’s novel of the same name, Rachel McAdams plays the long-suffering spouse of a Chicago librarian (Eric Bana) with a very unusual genetic disorder that renders him prone to chronological displacement. We bet he’d disappear less frequently if McAdams’ character wore the very revealing Emilio Pucci number that the actress turned heads in at the film’s premiere Wednesday night.

In Inglourious Basterds, Quentin Tarantino’s WWII spaghetti western, Brad Plays stars as the leader of a group of Jewish-American soldiers. Pitt stepped out for the film’s Hollywood premiere, held Monday night at Graumann’s Chinese Theatre, accompanied by Angelina Jolie, who looked dangerously sexy in a formfitting strapless leather dress by Michael Kors.

Hollywood’s junior A-listers turned out in droves for the Teen Choice Awards, held last night at Universal Studios’ Gibson Amphitheatre. Surfboard trophies were given to Robert Pattinson, Miley Cyrus, Megan Fox and Leighton Meester, who stunned in a tiered taffeta Louis Vuitton frock. Meester, who was honored for her role as Blair Waldorf on Gossip Girl, has also been making waves in the music industry: The actress-turned-singer lent vocals to Cobra Starship’s current chart-climbing hit “Good Girls Go Bad.”

In his provocative new comedy Spread, Ashton Kutcher plays the boy toy of an L.A. corporate lawyer (Anne Heche). The hunky actor, joined by costar Heche and wife Demi Moore, looked particularly dapper at a Las Vegas screening of the film this week. And Moore was typically stunning, in a black one-shoulder dress by Roland Mouret.

Michelle Trachtenberg’s latest small-screen role is a dramatic departure from Georgina Sparks, the vamp she portrays on Gossip Girl. In NBC’s new hospital series Mercy, she plays Chloe, a jittery novice nurse who cheerfully dons Hello Kitty scrubs much to the irritation of fellow staffers. At NBC Universal’s All-Star Press Tour party Wednesday night, Trachtenberg went a chicer route, opting for a nude-hued chiffon minidress with a bejeweled collar (she offset its understated palette brilliantly with a bright red pout).

Jon Hamm, January Jones, and the rest of Mad Men’s comely cast stepped out for the L.A. premiere of the AMC period drama’s third season Monday night. Jones looked far more contemporary than her character, ‘60s housewife Betty Draper, in a navy cutout Andrew Gn number, which she cinched with a black patent-leather belt and paired with Brian Atwood pumps.

The stellar lineup at this year’s All Points West included Jay-Z, the Yeah Yeah Yeahs, Vampire Weekend, Coldplay, MGMT, and plenty of other A-list acts—and we were as anxious to witness the fashions of festival-goers offstage as we were the performances. The Carrera Sunglasses & Columbia Records APW after-party, held at NYC’s Cooper Square Hotel, was attended by the likes of Alexander Wang, the Ting Tings, and Agyness Deyn, who covered up an all-black outfit with a psychedelic topper.