Star Tracks - Monday, September 10, 2007

Following her panned performance at MTV's Video Music Awards, a subdued Britney Spears return to her room at the Bellagio Hotel in Las Vegas Sunday night with brother Bryan by her side. A source tells PEOPLE that Spears was "embarrassed" about the reaction to her performance.

Victoria Beckham makes a splashy departure from Los Angeles International Airport on Sunday in her mod minidress. Appropriately, the fashionista is set to appear on Ugly Betty when the ABC show returns this fall.

Ben Affleck gets some helping hands from members of the African Children's Choir at the One X One benefit – which raises money for children's charities – in Toronto on Sunday. Next, the actor plans to visit Tanzania with his friend Matt Damon, who hosted the charity event.

Leave it to Jennifer Lopez to turn the red carpet into her own fashion runway! The singer-actress let it flow in Roberto Cavalli at the opening of the Just Cavalli New York flagship store on Friday, where Jessica Simpson and Mary J. Blige (not pictured) also stopped by.

Courtney Love comes ready to play, touching down at New York's John F. Kennedy Airport Sunday carrying her guitar by her side.

Jessica Simpson gets a hello from designer Michael Kors Sunday backstage at New York's Fashion Week. The Major Movie Star actress recently told PEOPLE she has designs on her own fashion label. "We're trying to figure out the clothes line," she said. "I want everybody to be comfortable in my clothes."

Mom and Dad take a night off from the kids as Brad Pitt and Angelina Jolie get wrapped up in each other Saturday at the Toronto International Film Festival. The pair premiered Pitt's The Assassination of Jesse James by the Coward Robert Ford – for which he won best actor at the Venice fest – then hit up the afterparty at the Park Hyatt Hotel.

Dad Tom Cruise gives a hand to both his girls – wife Katie Holmes and daughter Suri – while on the set of his film Valkyrie in Berlin.

Are-they-or-aren't-they twosome Reese Witherspoon and Jake Gyllenhaal keep each other focused while promoting Rendition Friday at the Toronto International Film Festival. On the way into the event, Gyllenhaal raved about his costar: "We don't have any scenes together actually, but she's incredibly talented."

Sharing a love for upscale accessories, mega-mom Angelina Jolie and daughter Zahara, 2, step out in matching mommy-and-me Valentino "Histoire" handbags during a trip to a New York City park on Friday.

For more on Angelina's accessories, go to our Off the Rack blog.

After attending the Fashion Rocks Concert the night before, mom-to-be Nicole Richie charges ahead with her busy New York schedule, hitting the Max Azria fashion show at Bryant Park on Friday.

Absent from the frenzy of New York Fashion Week, supermodel Kate Moss enjoys some downtime with pals Thursday on a beach in Saint-Tropez.

Eva Mendes works her way through a sea of photographers Friday at the Deauville Film Festival in France, where she is promoting her new reality show mockumentary Live!.

Sienna Miller brings a fashionable cause to the Toronto International Film Festival, where the actress was on hand to launch her new clothing line Twenty8Twelve on Friday.

While promoting their summer hit Superbad in Ireland, Jonah Hill, Christopher Mintz-Plasse and Michael Cera raise their pints of Guinness (of course!) to more good times in Dublin on Friday.

After making an appearance at the BCBG show earlier this week, Ashlee Simpson gets some fresh air Friday during a stroll in New York City.

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