Cameron Diaz arrived at NYC's JFK airport this evening. The actress was fresh off a stint in Atlanta, where she's been filming What to Expect When You're Expecting. She may be meeting up with boyfriend Alex Rodriguez, who's in the Big Apple for a series with the Yankees against the Toronto Blue Jays. Alex actually sat out the last few games due to a hand injury, but he was back in play this evening to lead the Yankees to a win. He will hopefully have time to celebrate Cameron's 39th birthday. Her new costar, Cheryl Cole, shared her own wish for Cameron on Tuesday. Cheryl tweeted, "Happy birthday Cameron, you sexy beeeyyaatchh!"

Brad Pitt was solo today when he touched down at the London Polo Club in a helicopter. He arrived back in the English capital, where his family has been based for the last week. Production on Brad's movie World War Z has moved all around Europe this Summer, starting in Malta before moving on to England and Scotland. Angelina Jolie has spent the last few days in the city with their six little ones — Angelina organized a garden party for Pax, Maddox, Shiloh, Vivienne, Knox, and Zahara this afternoon, which included races, jugglers, and more! There have been lots of treats for the children this Summer. Brad even bought his kids Shetland ponies, according to reports, which will be housed at their chateau in France.

Nicole Richie and Harlow Madden held hands today on their way into Malibu's Labor Day fair. While they were checking out the rides and soaking up the sunshine, Joel Madden was off on his own adventure with his brother, Benji. The guys caught an early morning flight to Florida where Joel's scheduled to DJ at Miami's Fontainebleau tonight. It's been a busy Summer for the Richie-Madden family — Joel just wrapped up a global tour with Good Charlotte, and Nicole teamed up with Jessica Simpson on the reality show Fashion Star. Despite their busy schedules, Nicole and Joel still made time for date nights, routine trips to the gym, and fun family outings with the kids. Joel recently chatted with us at the MTV VMAs and shared sweet details about their family life. It seems he's not the only one with a natural talent for music. According to Joel, Harlow and Sparrow are picking up musical tips from dad, since she loves to sing and Sparrow's into playing the drums.

Gwyneth Paltrow looked stunning in a backless Prada gown and Bulgari earrings on the red carpet at the Venice Film Festival today. She was on hand for the premiere of Contagion after promoting the movie in an orange dress, also by Prada, at a photo call this morning. Gwyneth had costars Matt Damon, Laurence Fishburne, and Jennifer Ehle by her side for the event before the whole cast got glamorous for this evening's red carpet. Gwyneth stuck close to Matt and his wife, Luciana, on her way into the screening and showed off her goofy side by giving Matt bunny ears for the cameras.

Victoria and David Beckham stopped by Maxfield in West Hollywood with their oldest son Brooklyn and youngest daughter Harper on Friday. David held precious baby Harper in his arms while Victoria stayed close to Brooklyn. We saw Victoria Beckham's first postbaby outing last month, and this time the mom of four showed off longer hair and her slim figure in an all-black ensemble and super sky-high heels. Victoria may be hanging near home lately, but David's been all about spending time with his boys. They've been spotted boogie boarding in Malibu often since Harper's birth in July and the holiday weekend should give them plenty of time to hit the waves before Summer winds down.

Matt Damon changed into a suit for the premiere of Contagion in Venice this afternoon. His wife, Luciana, was by his side for the red carpet event and sparkled in a gold gown. Matt had his other leading lady, Gwyneth Paltrow, there for this morning's Contagion photo call at the Venice Film Festival, where they were joined by director Steven Soderbergh and costars Jennifer Ehle and Laurence Fishburne. Matt will be on the go again soon, since he'll be showing off the movie at the NYC premiere next week. Gwyneth, though, isn't expected to attend the Big Apple event.

Gwyneth Paltrow and Matt Damon joined director Steven Soderbergh today at the Venice Film Festival. Along with their costars Jennifer Ehle and Laurence Fishburne, they posed for photos at a press event for Contagion. Matt, still sporting the shaved head he needs to shoot Elysium, was in LA recently for the movie's junket — Matt shared his nickname "Red Alert" and spoke about working with Steven and Gwyneth. Gwyneth, meanwhile, added to the festival's glamour in a bright Prada dress. She rose early for the photo call after recently getting engrossed in a new TV show. She tweeted yesterday, "Just finished AMC's The Killing. Devastation! Any suggestions for a new series to get into?" Steven and Matt will team up later this week in NYC for their US premiere; though, Gwyneth isn't expected to join in on the Big Apple fun. However, Matt will have another leading lady from their star-studded cast for company on the red carpet, since Marion Cotillard will attend.

Gisele Bundchen threw on her exercise clothes to hit the gym in Boston yesterday. The supermodel gets in regular workouts while in Massachusetts, as her husband, Tom Brady, is busy playing with the Patriots. He just had a final preseason game against the Giants, and will have a first regular match vs. the Miami Dolphins on Sept. 12. Gisele is also exploring the city with her nearly 2-year-old son, Benjamin, and they had a picture-perfect park date with Tom's dad, Tom Brady, Sr., a few days ago. Additionally, Gisele will be seen in Esprit's Fall ads as well as the upcoming print campaign called "Burlesque" for her own line of underwear called GB Intimates.

Beyoncé Knowles kicked off an exciting week of celebrity news with her pregnancy announcement at the MTV VMAs, while Bar Refaeli kept the fun coming in a sexy bikini. The Jolie-Pitt family continued their London adventures, and Prince Harry let loose during a wild night out in Croatia. That's not all that happened — there was so much to see this week, so click through for a roundup of the biggest news and best stories!