Reese Witherspoon wore a sheer blue shirt on Thursday night when she had dinner with friends at The Tavern restaurant in Brentwood. Cameron Diaz was among the ladies who gathered for the meal, and she was seen waiting inside for her car to arrive as Reese faced the photographers. It was an evening out on the town for Reese, who has been busy lately spending time with her kids, Ava and Deacon, and husband Jim Toth. Reese is prepping to return to movie making in Jason Segel's Sex Tape, but for now is spending her days adding to her wardrobe at some of LA's most chic boutiques. Cameron, meanwhile, has been on set for Gambit and What to Expect When You're Expecting. Cameron has been catching up with girlfriends like Reese and Gwyneth Paltrow since splitting with boyfriend Alex Rodriguez a few months ago. New reports say Cameron Diaz is dating Diddy, but the two have been friends for years.

Jennifer Garner threw on a plaid scarf yesterday to run errands in LA. Her daughters, Seraphina and Violet, were out and about with their nanny. Violet threw on her karate uniform in the afternoon for her latest martial arts class. Jennifer is keeping busy in the run-up to the arrival of her and husband Ben Affleck's third child. Jennifer and Ben haven't announced a due date, but she's one of the many pregnant celebrities who seem to be nearing the final months of sporting a baby bump.

Kate Hudson wore her red jeans yesterday when she and fiancé Matt Bellamy stopped for lunch and coffee at LA's Brentwood Country Mart. They sat down for lunch inside and were spotted holding hands over their table after a waiter had cleared their plates. Despite the rain, both Kate and Matt rocked sunglasses as they ran out to their Prius.

The jet-setting couple is back in California following a couple trips to London over the last few months. England-born Matt and his band Muse have apparently been working on their next album there. Work has brought Kate home to the US, though, to shoot The Reluctant Fundamentalist in NYC. She headed west in time to host her annual Halloween party, which brought out a J. Lo-clad Nicole Richie and Gwen Stefani as Cinderella. Kate and a couple of her close friends reportedly dressed up like Playboy Bunnies.

It was another exciting week in Hollywood as stars dressed up for Halloween, stepped out for events, and shared big news. Kim Kardashian announced her divorce from Kris Humphries after just 72 days of marriage, while Jessica Simpson finally confirmed that she and Eric Johnson are expecting their first child. Prince William and Kate Middleton made a public appearance in Copenhagen, and Robert Pattinson, Taylor Lautner, and Kristen Stewart kicked off Breaking Dawn Part 1 promotions with a hand and footprint ceremony. That's not all that happened though — click through to see all the biggest news and best pictures!

Getty, AKM Images, WireImage, Flynet, INFDaily.com