Star Tracks: Thursday, September 9, 2010

A beaming Halle Berry grabs coffee with her Dark Tide leading man Olivier Martinez in London on Thursday, where the cozy costars were spotted holding hands after a romantic weekend in Paris.

Gwen Stefani and hubby Gavin Rossdale squeeze in some alone time with a stroll through New York Wednesday. The singer will close out Fashion Week on Sept. 16 with a runway show for her spring 2011 L.A.M.B. collection.

Gwyneth Paltrow steps out in support of gal pal Stella McCartney Wednesday, stopping by the designer's London store for Fashion's Night Out.

After an enthusiastic showing at the U.S. Open, Ashlee Simpson-Wentz totes son Bronx, 22 months, around the Big Apple on Wednesday. " NY has been a blast with my buddies and my sweet family," she Tweeted. "Lots of LOVE."

Holly Madison shows her support for the home team Wednesday, throwing out the first pitch at Angel Stadium in Anaheim, Calif. The Los Angeles Angels went on to beat the Cleveland Indians, 4-3.

Director and star Ben Affleck joins costars Rebecca Hall, Jon Hamm and Jeremy Renner at the Venice Film Festival premiere of The Town in Italy on Wednesday. The crime thriller opens Stateside on Sept. 17.

See more stylish stars in Venice here!

Good Charlotte's Joel Madden finds a kindred fitness spirit in brother Benji while hitting the streets of Beverly Hills for a morning jog on Wednesday. The twins will release their fifth album, aptly titled Cardiology, in November.

After strutting her stuff at Fashion's Night Out, Gisele Bündchen makes stroller patrol look downright chic with son Benjamin, 9 months, in New York's SoHo neighborhood on Wednesday.

Taking to the beach Thursday, mom-of-two Denise Richards flaunts her bikini body in Malibu, Calif.

Kevin, Frankie and Nick Jonas lend their star power to Disney's Friends for Change: Project Green in St. Petersburg, Fla. Wednesday, where the trio helped clean up local beaches.

Taylor Swift teams up with the NFL's Play 60 campaign to fight child obesity in New Orleans Wednesday. The country singer is set to perform alongside Dave Matthews Band from Jackson Square on Sept. 9 to kick off the NFL season.

After launching her denim line the night before, Jessica Simpson goes glam in an LBD – and gets a hand from her friend – while tacking New York subway grates in heels Wednesday.

It's a big day for a big boy! Sarah Jessica Parker gives her 7-year-old son, James Wilke Broderick, a lesson in bold colors on their way to his first day of school in New York City Wednesday.

January Jones joins her stunt double Wednesday while filming X-Men: First Class in Buckinghamshire, England. The Mad Men star is playing Emma Frost, a.k.a. the White Queen.

Meet the new face of Olay! Grammy winner Carrie Underwood snags her first beauty contract in New York Wednesday as the skin care line's first-ever North American celebrity ambassador.

Tyra Banks and Vogue's editor-at-large André Leon Talley have a ball celebrating the 15th cycle of America's Next Top Model at Marea in N.Y.C. Wednesday, hours ahead of the show's premiere on the CW at 8 p.m. EST.