The Tonight Show

Gwyneth Paltrow continued her whirlwind week of press for Iron Man 3 with an interview on The Tonight Show yesterday. She chatted with host Jay Leno about meeting costar Robert Downey Jr. almost 20 years ago when he was in his "wild" phase and also talked about her least favorite feature. Gwyneth shared that "it's to do with butt cheeks," which she nearly revealed during Wednesday's Iron Man 3 premiere. She wore a sexy, sheer Antonio Berardi gown for the event and opened up about the fashion risk in a funny interview with Ellen DeGeneres that will air today. Gwyneth joked that she and her team were "scrambling for a razor" since she couldn't wear underwear with the dress, leaving her "humiliated."

Jay Leno had double the fun on The Tonight Show in LA yesterday when both Emily Blunt and Tom Cruise stopped by. Emily was there to chat about her film with Colin Firth, Arthur Newman, which hits theaters in limited release tomorrow, while Tom talked up Oblivion. They'll be back together on the promotional trail next year, since they have All You Need Is Kill coming out in 2014. Until then, Emily had only good things to say about Tom, whom she called "instantly popular," and stuck around to show her support during his interview with Jay. Tom rattled off some of his most famous movie lines from Risky Business and others and also shared the story of getting his first motorcycle. Watch a clip of the fun when you click into the gallery!

Halle Berry stopped by The Tonight Show with Jay Leno last night to promote her new thriller, The Call. The actress wore a sexy Reem Acra dress with cutouts — a trend she also donned at the Chicago premiere of her movie last month. Yesterday, talk turned from The Call to another project, when Halle confirmed that she would reprise her role as Storm in X-Men: Days of Future Past. She told Jay, "It's like family. It's fun to get back together with Hugh and everybody. It's good fun." Production will begin soon as the film is projected for a Summer 2014 release.

Halle's fans won't have to wait that long to see her on the big screen, as The Call hits theaters Friday. But that's not all she has to celebrate this week. Her daughter, Nahla Aubry, turns 5 on Saturday. Halle told Ryan Seacrest on his radio show this morning that she'd be bringing M&M's with Nahla's face on them as a class treat, then throwing a My Little Pony-themed party over the weekend.

Jessica Simpson wore a low-cut dress for an appearance on The Tonight Show yesterday. Fresh off an extended holiday vacation to Hawaii with her fiancé, Eric Johnson, their daughter, Maxwell, and a rotating cast of friends and family, Jess was ready to chat about her second pregnancy and her various work projects. One of those projects was announced yesterday morning — a Jessica Simpson scripted comedy is in the works at host Jay Leno's network, NBC.

Jessica was her usual funny candid self while talking with Jay about her expanding family. She said that she and Eric, who've been engaged for two years, "had two different wedding dates, but he keeps knocking me up! We're doing it very backwards. I'll just keep my legs crossed this time." As for their having two kids within two years, apparently it wasn't planned. Jessica admitted, "I was extremely shocked because I was going through a lot of hormonal changes, trying to get back to the old, vibrant Jessica. You know, it was kind of like a one-night stand. And it happened all over again!"

Emma Stone showed skin in a cutout J. Mendel dress for her appearance on The Tonight Show yesterday. She showed off her dancing skills with Jay Leno and chatted with the host about her upcoming film, Gangster Squad. Emma premiered the film in LA on Monday in a bright red Lanvin look alongside leading man Ryan Gosling, who brought his mom as his date. The costars are prepping for the Friday release of the crime drama, and Ryan's getting extra attention with a new People cover naming him America's most wanted man.

Emma will be back in the spotlight tonight though, since she's nominated at the People's Choice Awards for her work in The Amazing Spider-Man — make sure to watch right here on PopSugar starting at 7:30 p.m. EST/4:30 p.m. PST when we'll be LIVE on the PCA red carpet!

Megan Fox stopped by The Tonight Show last night to chat about her latest film, This Is 40. She wore a figure-flattering blue Roland Mouret dress that showed off her postbaby body. Megan gave birth to her baby boy, Noah Green, three months ago, and while chatting with Jay Leno last night, she jokingly shared concerns that Noah was not the average baby. "I was convinced that I was, like, maybe birthing a vampire baby like the one in Twilight — you know what happens to Bella, where she's in cold sweats all the time."

Megan also revealed that the last time she stopped by The Tonight Show, she was actually trying to hide her growing baby bump. "I was about two months pregnant. I was really sick." Fortunately, Megan made it through the rough patch and went on to describe the pregnancy as "perfect." Now the first-time mom, and stepmom to her husband Brian Austin Green's son Kassius, is enjoying motherhood and celebrating the release of her comedy with Leslie Mann and Paul Rudd.