Jay Leno

Vanessa Hudgens visited The Tonight Show With Jay Leno last night to promote her latest film, Spring Breakers. The actress wore her hair up in a ponytail with a bright yellow beaded Alice + Olivia dress. During the interview, Vanessa shared behind-the-scenes secrets from shooting a few of the film's racier moments and even showed off the "booty popping" dance moves that won her an on-set contest. Backstage, Vanessa and Jay posed for an Instagram photo, adding to the many social snaps Vanessa and her costars Selena Gomez, Ashley Benson, and James Franco have taken during the promotions. Spring Breakers premiered in LA last Friday, and the film is in theaters tomorrow.

Kristen Stewart was smiley and happy as she stepped out in a colorful Peter Pilotto dress to chat with Jay Leno for The Tonight Show in LA on Monday evening. Kristen spoke to Jay about the final Twilight movies, Breaking Dawn Part 1 and Part 2, saying, "Popped one out — pretty concerned with that. Me and Edward are doing quite well; people keep trying to kill my baby. But I'm now superspectacular, so I can take care of that, being a vampire." Kristen also touched on Breaking Dawn Part 2's twist ending: "Every time I see it or even think about it, I get giddy. It freaks me out. . . . It's easy to skim over. But you can find the root of our little twist [in the book]." Kristen switched gears from her blockbuster franchise to promote her indie project On the Road over the weekend. Kristen premiered On the Road at the AFI Festival in LA on Saturday, and she was joined by boyfriend Robert Pattinson at that afterparty. While Kristen was chatting with Jay, Rob was elsewhere in town making his own appearance on Jimmy Kimmel's show.

Jennifer Garner sat down with Jay Leno last night to discuss her upcoming film Butter, which hits theaters this March. Talk turned from work to her personal life, though, when Jennifer opened up about her pregnancy. She shared that her girls, Violet and Seraphina, are getting excited for their new sibling and are even trying to help name the child by holding "baby naming contests." They've apparently come up with mostly Disney-inspired ideas, including Peter Pan and Captain Hook. Jennifer wouldn't reveal the sex of the little one, but she did say that she's not due until the Spring. As she awaits the arrival of her new addition, Jennifer's been sticking close to home and recently relaxed with a trip to a local nail salon.

Michelle Williams stopped by The Tonight Show studios in LA yesterday. The star of My Week With Marilyn spoke with host Jay Leno about her film, which has earned a great deal of praise for Michelle. She's picked up best actress nominations at the SAG, Critics' Choice, and Golden Globe awards so far. We'll find out on Jan. 24 if she can add Oscars to that list, possibly making it her second year in a row of being in the running for an Academy Award. Michelle spoke with Jay about the process of making her Marilyn movie. She admitted, though, that she didn't really try to harness Marilyn's legendary sex appeal in her own life. Michelle told Jay, "I stayed a little bit in character while I was making the movie. It makes it easier that way. I remember experimenting with it early on. What was it like to walk around like that? What were people's reactions to it? But no, I think I would have felt silly trying to pick up somebody at a bar."

Sandra Bullock wore a loose blue dress yesterday to sit down for a chat with Jay Leno on The Tonight Show With Jay Leno. The actress was out and about chatting up her upcoming film Extremely Loud and Incredibly Close, which she promoted last week in NYC. While in the Big Apple, Sandra spoke about how she's prepping for her second Christmas with her young son Louis. She plans to spoil him with plenty of presents and even laughed with Today's Matt Lauer about getting Louis a G-V jet!

Last night, Sandra Bullock's Christmas traditions were also up for discussion. She revealed one meal that she and her German relatives just have to have even though it's technically illegal! She said, "Since my mother passed, we break the law, because we have to manage to smuggle German sausages into the country, and apparently bringing meats across the waters is against the law . . . You fry 'em up with some sauerkraut and potato salad, but they have to be the right ones."

Kristen Stewart continued her promotional rounds for Breaking Dawn Part 1 with a stop by The Tonight Show With Jay Leno yesterday. Kristen slipped on her second minidress of the day, a black and blue Monique Lhuillier, after being spotted in a casual plaid shirt outside of Jimmy Kimmel Live earlier in the evening. Talk with Jay turned to her newest project Snow White and the Hunstman, which she's been working on in London.

Kristen shared details about a recent fight scene she filmed with costar Chris Hemsworth where she actually punched Chris in the face when she "was supposed to miss him by this much." Kristen went on to explain with excitement, "It made such a sound! Girls, if you’ve ever wondered if it works — it works! I mean, it literally spun him right around. It was crazy.” The punch wasn't the cause of her current hand injury though, it was apparently due to the dwarves. Kristen said, "those pesky little creatures. I broke my thumb on one of them. Actually, I didn’t break it. It was a really bad ligament tear.”

This weekend our friends in the States celebrated the Fourth of July, and plenty of celebs got together to enjoy the holiday! From Eclipse stars on the promo trail to shirtless and bikini fun, it was a weekend to remember. We've seen how they partied in years gone by, so click through to see who did what this year!