• Matthew McConaughey, hopping behind the bar and mixing up a vodka soda at the Hard Rock Hotel in San Diego. When he wasn’t playing mixmaster, or talking up his movie Surfer Dude, the actor relaxed in a poolside cabana and hit up the Moonstone Lounge at night.
• A downpour didn’t stop Ashley Olsen from showing up to celebrate trendy New York boutique Intermix’s 15th anniversary at the Bowery Hotel. The fashionista mingled with guests like Michelle Trachtenberg and Ugly Betty‘s Becki Newton at the bash, which also featured an intimate dinner of beef carpaccio and king salmon. Olsen was out the night before too: She stopped by the Russian Tea Room for some champagne and caviar. The occasion? A birthday fete for socialite Victoria Traina, the daughter of Danielle Steel.
• Courteney Cox Arquette, celebrating a birthday along with husband David Arquette at New York gastropub the Spotted Pig. The group seemed to enjoy fondue and cake, an observer reports, noting that the former Friend looked “gorgeous” in her gray shift dress.
• Jessica Alba, happily pushing 2-month-old daughter Honor Marie through Los Angeles International Airport’s Terminal 6 with husband Cash Warren following right behind. Alba would lean over and check on her daughter in the stroller, while Warren made sure the family had everything.
• Shanae Grimes and her new 90210 costar Annalynne McCord, grabbing a Vital Action Performance Water while browsing the goodies at a style suite in L.A. Also there: 90210 alum Tori Spelling and Dean McDermott, who pushed daughter Stella, 2 months, around the pool in her baby carriage while guests clamored to get a look. According to a source, the baby girl looks just like her father.
Also Spotted …
• John Mayer, mingling on the rooftop of New York’s Hotel Gansevoort with comedian friend Sherrod Small, who gamely chatted up the ladies. Mayer, meanwhile, kept it low-key. … Diddy, offering his presidential endorsement – for Barack Obama – over the mic, while partying at Shrine, the nightclub at MGM Grand at Foxwoods in Connecticut. … Nicky and Kathy Hilton, browsing the jewelry at the Lia Sophia suite at L.A.’s Thompson Hotel.
• By MARK DAGOSTINO, JENNIFER GARCIA, LIZA HAMM, MARISA LAUDADIO, MARY MARGARET, KRISTEN MASCIA, LESLEY MESSER and STEPHANIE PROMMER
Want to see where the celebrity action goes down? Tour all the Celebrity Hot Spots.