New Year's Eve Movie

Zac Efron hosted a screening of his latest film, New Year's Eve last night, before sitting down with press this morning in Tokyo. The romantic comedy took the top place at the box office last weekend, though Zac and his costars will have some stiff competition this weekend when Sherlock Holmes: A Game of Shadows and Mission Impossible — Ghost Protocol join the mix of holiday offerings.

Zac debuted his latest tattoo on his right hand during today's promotional appearance. The YOLO design reportedly stands for "you only live once," and it joins a hot feather tattoo inked inside Zac's bicep. Zac's arm muscles and six-pack make him a serious contender for the hottest shirtless star of 2011. He topped our shirtless bracket over the Summer, but he'll need your votes if he's going to overtake the current poll leader, Robert Pattinson.

Stars from Garry Marshall's New Year's Eve came out in their finest holiday attire tonight for the East Coast premiere of the ensemble film. Zac Efron and Michelle Pfeiffer, who were also on hand for Saturday's junket and Monday's LA premiere, hit the carpet in the Big Apple and posed for photos. It was a busy day for Zac who kicked things off with an appearance on Live With Kelly then zoomed over to NBC studios where he sat down for a chat with Jimmy Fallon. Jessica Biel also hit the talk show circuit, and made a sexy appearance on the Late Show wearing a white Victoria Beckham design before changing into a sparkly floor-length Valentino to join her costars at the screening.

Sarah Jessica Parker and Matthew Broderick left the kids at home and stepped out together for their latest night on the town. The couple dressed in black tie for the Kennedy Center Honors over the weekend, but for tonight SJP selected a playful gray and white dress, and Matthew modeled a traditional navy suit. Jon Bon Jovi and Taraji P. Henson hit the event solo while Robert De Niro was joined by his lovely wife Grace Hightower.

The NYC set of New Year's Eve got another dose of star power when Ashton Kutcher and Lea Michele showed up to shoot yesterday. They were in front of the cameras for a kissing scene after Halle Berry, Katherine Heigl, a pregnant Alyssa Milano, and Ryan Seacrest all got into character for the film. The movie is Lea's very first, and she's juggling her big-screen duties with her work on Glee. She even made sure to record last night's episode of her show since she wasn't able to watch it live. Ashton, who was part of the ensemble cast of Valentine's Day, headed to the Big Apple following a promotional trip to Austin for SXSW.

Ryan Seacrest and Julianne Hough were arm in arm yesterday for a walk in NYC. She accompanied her boyfriend on the trip to the East Coast, where he shot a cameo for New Year's Eve. He was occupied with the movie on Monday night, as he was spotted filming a Times Square countdown scene with the city's mayor, Michael Bloomberg, that was reminiscent of Ryan's real-life tasks on December 31. Ryan even tweeted to fans that he was happy to have rehearsed the role beforehand. His stint on set freed up Rock of Ages star Julianne to catch up with old friends, though she's been plenty busy lately between her date nights with Ryan and their global jet-setting.

Alyssa Milano scrubbed in on the set of New Year's Eve in NYC yesterday. She's the most recent star to dress up in medical gear for the cameras after Halle Berry donned a similar blue ensemble on Tuesday. The pregnant actress has apparently been getting plenty of parenting advice from her costars, with Halle being the latest to talk about the experience of motherhood. Some words of wisdom have been harsh but reassuring for Alyssa, but the mom-to-be insists that the tips make her feel much better. Alyssa has a little while to go before the birth of her first child, which means she can fully enjoy her time at work with the rest of the ensemble cast including Robert De Niro.

Katherine Heigl had assistance with her umbrella this morning on the NYC set of New Year's Eve. The actress is the latest to join the star-studded cast that includes Zac Efron, Sienna Miller, and Jessica Biel. Katherine took over a part that originally belonged to Halle Berry, who dropped out to focus her attentions on her battle for custody of her daughter, Nahla, with ex Gabriel Aubry. One of Katherine's other costars in the comedy, Ashton Kutcher, has been lucky to escape the cold temperatures — he's been working on his tan and enjoying a Brazilian vacation with Demi Moore. The Garry Marshall-directed movie will reunite Killers leading man and woman Ashton and Katherine, and hopefully their second big-screen effort will fare better critically than the first.