Jeff Vespa/WireImage, Dave Hogan/Getty ImagesMUSIC LOVERS: Sienna Miller and Balthazar Getty, checking out Starsailor frontman James Walsh's show at Hotel Café in Hollywood.
FRESH DISH: Justin Timberlake and Jessica Biel, chatting with Bonnie Somerville and Lindsay Sloane at sushi restaurant Katsu-Ya in Studio City, California.
It hasn't taken long for Benji Madden to get over Paris Hilton. Keep reading to get deets on the rocker's recent late-night club hopping…
PARIS WHO?: Benji Madden, partying at ONE Sunset in Los Angeles next to Shauna Sand and a table full of pals a night after he partied away at Hollywood hot spot Bardot's weekly burlesque show.
CAR TALK: Avril Lavigne and Sum 41 hubby Deryck Whibley, chatting about buying a Bentley while having dinner with Lavigne's father at Casa Vega in Sherman Oaks, California.
SWEET SOUNDS: Robin Thicke, serenading his wife, Paula, with "Happy Birthday" during a get-together with friends including Taye Diggs, Tyrese Gibson and Sanaa Lathan at Chateau Marmont in West Hollywood.
SWAG-A-THON: Katy Perry, swooping up scarves from Anu by Natural, underwear from Spreegirl and rings from Guy and Eva, at KIIS-FM's Jingle Ball gifting suite outside of L.A.
PUSSYCAT GALORE: Nicole Scherzinger, dining with a few pals at T.G.I. Friday's at the Block at Orange in Orange County, California.
JUST DEUX IT: Hayden Panettiere, Sean Kingston and Jesse McCartney, checking out Akon's performance at Les Deux in Hollywood.
COCKTAIL HOUR: DJ Joel Madden, sipping ÍS Vodka cocktails alongside Audrina Patridge at the Fila/Sportie LA party.
CARB RUN: Former Dancing With the Stars contestant Stacey Keibler, munching on a cupcake at the launch party of Jamie-Lynn Sigler's jewelry line, C.J. Free, at the Switch Boutique in Beverly Hills.
ANIMAL CRACKERS: Jerry O'Connell, buying pet supplies at Target in West Hollywood.
—Additional reporting by Dahvi Shira and Claudia Rosenbaum