Kim Kardashian emerged at LAX on Monday evening, arriving for a flight to Australia at the end of a very dramatic day for the reality TV star. Kim announced her divorce from Kris Humphries earlier in the day, and this is her first public appearance since the news broke. Kim and Kris's split comes after only 72 days of marriage. Kim and Kris tied the knot with an over-the-top televised wedding at the end of August and were together less than a year before their walk down the aisle. Kim was not wearing her wedding ring or enormous diamond engagement band as she headed Down Under.

While she may be heading out of town, Kim was out on the red carpet to celebrate Halloween in a sexy Poison Ivy costume over the weekend, and on Sunday she joined her sisters Kourtney and Khloe on stage at Jimmy Kimmel. Even though she has not been spending much time with her new husband, Kim's filing for divorce this morning was still a shock for many fans who tuned in to watch the big Kim Kardashian wedding special just a few weeks ago. We took a look back at Kim and Kris's whirlwind romance to reflect on the news, which seemed like it was even a surprise for the recent groom. Kris Humphries's statement about the divorce made it sound like he didn't know it was coming, though many of you aren't buying that. We're sure to hear a lot more as this plays out over the next few weeks and, of course, on the Kardashian's many reality TV shows.

Jessica Simpson confirmed her pregnancy earlier today by tweeting a picture of her mummy Halloween costume, and now she's sharing even more from their festive shoot! Jessica posted more pictures of her tight, baby-bump-baring getup alongside Eric Johnson as classic Celtics star Larry Bird. Eric is from the Boston area, so the team must be close to his heart. Even their dog, Bentley, got in the spooky spirit with a fun pearl leash and collar. The designer had two big announcements today as she finally revealed that she is expecting, and this morning Jessica launched her new venture BeautyMint. Just think, next Halloween Jessica and Eric will be out trick-or-treating with their son or daughter — congrats to the growing family!

Naomi Watts and Liev Schreiber are the latest celebrities to step out in costume today! They hit the streets of NYC with their kids, Sasha and Samuel, though Samuel sported regular clothes for the spooky holiday. Naomi was in a full clown outfit while Liev was draped in a grim reaper robe and Sasha in a samurai suit. There were plenty of celebrities in Halloween costumes over the weekend, especially at Kate Hudson's annual party in LA. Nicole Richie went as Jennifer Lopez, Jessica Alba was a witch, and Ali Larter channeled a bumblebee. Stay tuned for all the cute celebrity kid costumes that will be on display during tonight's trick-or-treating fun!

Robert Pattinson had his hood and sunglasses on as he made his way through LAX today. He was in London spending time with girlfriend Kristen Stewart, and the duo were both spotted coming out of her apartment on Saturday. Rob popped over to the UK to visit Kristen after traveling to France and Belgium to promote Breaking Dawn: Part I with Ashley Greene. Their costars Jackson Rathbone and Nikki Reed took over press most recently with stops in Spain and Italy. The entire Twilight cast will soon join Rob on the West Coast, since they have junket duties to take care of this weekend. Before they sit down with the media, Robert, Kristen, and Taylor Lautner will also get together for their special Hollywood handprint ceremony on Thursday.

Justin Timberlake and Amanda Seyfried were side by side for the UK premiere of In Time today. Justin wore a sexy suit while Amanda wowed in bright blue shorts and a jacket from H&M. The costars are showing off the project overseas after it was released in the US on Friday. In Time came in third at the box office with Puss in Boots and Paranormal Activity 3 taking the top spots. Justin also promoted his big-screen effort in a recent interview with a British men's magazine, though talk turned from acting to his love for the newest members of the royal family. Justin said in Esquire, "Us American males are big fans of Pippa. We like the Middletons very much. I'm going to sound like a sleazeball. I'm going to stop right there!"

Jennifer Garner had a special treat for Violet as she picked her daughter up from school in LA this afternoon — she was dressed as a witch! The pregnant mom donned a hat and cape for Halloween after gearing up for the holiday over the weekend. Jennifer, Violet, and Seraphina went trick-or-treating on Saturday, but Violet and Seraphina skipped the festive outfits. There have been plenty of other celebrities in costumes, including Nicole Richie, who also wore a witch hat today. Her kids, Harlow and Sparrow, were a princess and a pumpkin for an afterschool party, and there will be plenty more fun getups when families go door to door tonight.