Star Tracks - Friday, September 14, 2007

Hilary Duff catches a case of the giggles as she keeps her friend quiet on a shopping outing Thursday in Beverly Hills.

Christina Aguilera makes a revealing statement thanks to a figure-hugging shirt while out to dinner at Toscana in Brentwood, Calif., with husband Jordan Bratman on Thursday. Recently, Paris Hilton revealed that the pop star is expecting her first child.

Reese Witherspoon is abs-olutely in fine form during a workout with a trainer Thursday in Santa Monica.

After enjoying the Italian nightlife with model Sarah Lorraine Larson last week, George Clooney is back to work Thursday on the set of Burn After Reading in upstate New York.

Another day, another prop on set. Drew Barrymore swashbuckles her way through filming He's Just Not That into You on Thursday in Los Angeles.

A day after a custody meeting with Britney Spears, Kevin Federline is ready to party at L.A. club Vice – where he spent the night dancing closely with Colin Farrell's ex Nicole Narain.

Charlize Theron leans on her "husband," Stuart Townsend, at the Los Angeles premiere of her film In the Valley of Elah on Thursday night. While the pair are not legally married, they refer to themselves as wed.

After stopping for a little Jamba Juice pick-me-up, Mischa Barton is back on track and ready to shop, browsing the streets of SoHo Thursday.

Demi Moore and husband Ashton Kutcher step out Thursday in Tel Aviv, where the Kabbalah Center is celebrating Rosh Hashanah, the Jewish new year holiday.

Natalie Portman and Nathan Bogle – the former model and cofounder of Rag and Bone denim – make a pair on the streets of New York City on Thursday.

Courteney Cox heads back to her car Wednesday after lunching with friends at classic eatery Judi's Deli in Beverly Hills.

Hayden Panettiere shows a little puppy love, picking up pet supplies Wednesday in Los Angeles.

It's a night on the town for Elizabeth Hurley, who stopped by the ShortList magazine launch party Wednesday at Cecconi's restaurant in London.

Penélope Cruz and sister Ménica pitch in to support their musician brother Eduardo during a press event in Michoacan, Mexico, on Thursday. The sisters reportedly guest-starred in the music video for "Cosas Que Contar," the title track from his debut album.

But can he do it blindfolded? Jamie Foxx takes on the challenge of Rubik's Cube while visiting Will Smith on the Hollywood set of Hancock on Wednesday.