Justin Timberlake on ‘Social Network’ Set — FIRST PICS

A clean-shaven Justin Timberlake is ready to get down to business on the set of his new movie, The Social Network, on Monday (November 9) in Los Angeles.

The 28-year-old singer and actor will play Sean Parker, co-founder of Napster, in the Aaron Sorkin film.

JT will work with Adventureland’s Jesse Eisenberg, who portrays Facebook guru Mark Zuckerberg.

“I’ve been doing research about the film,” Justin told Extra. “I’m starting to creep on a little bit more and see what it’s all about.”

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Tiffani Thiessen and her husband, actor/artist Brady Smith, are expecting a baby in May.

The 35-year-old actress, who’s currently starring on USA’s drama White Collar, will be a mom for the first time next year, her rep confirmed.

“We are over the moon!” the couple said in a statement to People. “It’s something we’ve wanted for a long time and we are thrilled that it’s actually happening.”

Tiffani, who starred in the cult series Saved By The Bell, and Brady have been married since 2005.

Congratulations to the happy couple!!

Adam Sandler, wife Jackie and his adorable daughters have a fun day at at Santa Monica’s fun magic show Magicopolis on Sunday (November 8).

Sunny, who turned 1 last week, got a ride from mom Jackie in the stroller while Adam carried Sadie, 3. So cute!!

Variety reported that Adam will be playing both twins Jack and Jill in a 2011 comedy of the same name, set to film early next year.

In the meantime, he’ll be on the big screen in the high school reunion film Grown Ups and voicing a character in The Zookeeper.

FYI: Sadie and Sunny’s swag is being carried in a Serena and Lily Prague Gypsy Tote.

20+ pictures inside of the Sandler family’s day at Magicopolis…

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Justin Timberlake and girlfriend Jessica Biel get down to H to the Izzo at Jay-Z’s concert at L.A.’s Pauley Pavilion on Sunday (November 8).

The 28-year-old singer and actor joined other celebs at the concert, including James Blunt, Jamie Foxx, Nicole Richie and Samantha Ronson (all pictured below).

Rihanna also made a guest appearance at the show, singing “Run This Town” and debuting her new song, “Hard.”

Justin, who worked with Rihanna on her new album, told MTV last month that RiRi’s new music is edgier than before. “The stuff we’ve come up with in the studio, it’s the next step for her,” he said. “It’s a little more grown-up.”

15+ pictures inside of Justin Timberlake, Jessica Biel and other celebs at the Jay-Z concert…

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Rihanna and her BFF Melissa arrive at MTV’s Times Square studio to tape an appearance on It’s On With Alexa Chung on Monday afternoon (November 9) in New York City.

Last night, the 21-year-old Bajan beauty rocked the UCLA stage with two songs at Jay-Z’s concert.

Tonight, Rihanna will be honored at Glamour magazine’s “Women of the Year” celebration at Carnegie Hall. Unfortunately, she won’t be the special musical performance of the evening!
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Katie Holmes and co-star Anna Paquin shoot new scenes for their comedy, The Romantics, in Long Island, New York on Monday afternoon (November 9).

Katie, who replaced Liv Tyler, will play Anna’s best friend and maid of honor in the flick.

If you missed it, while in Boston on Friday, Katie and adorable daughter Suri wore matching outfits for Katie’s new fashion label Holmes & Yang. So cute!

Gwyneth Paltrow sports a red poppy in her hair for Remembrance Sunday as she strolls with a friend in London on Monday (November 9).

Variety reported that the 37-year-old actress recently signed on to star in The Danish Girl alongside Nicole Kidman in the story of the relationship between the first ever post-operative transsexual, Einar Wegener (Kidman), and his wife, Greta (Paltrow).

Thomas Alfredson, best known for Let The Right One In, will direct.

Rihanna makes a surprise appearance at Jay-Z’s concert at UCLA in Los Angeles on Sunday night (November 8).

The 21-year-old Bajan songstress performed “Run This Town” with Jay-Z and sang her new song “Hard” for the very first time! The new tune (featuring Young Jeezy) is off of Rihanna’s upcoming fourth studio album, Rated R, out November 20.

Check out Rihanna’s two performances below!

FYI: Rihanna will be on It’s On With Alexa Chung TODAY @ 3:30PM ET/PT on MTV.