Kate Bosworth is adding a whole lotta sex appeal to the holidays in a stunning Christmas campaign for Topshop.

The blonde beauty performs a sultry version of the classic song "Winter Wonderland" in a mini-movie released by the clothing company.

Michael Polish, Kate's fiance, directed his bride-to-be in this beautifully-shot performance. Kate's custom-made Topshop evening dress is to die for.

Topshop is also hoping that her version of "Winter Wonderland" will make it to the Number 1 spot on iTunes during this holiday season. Time will tell!

Making their first public appearance as a couple since his wife Mary's suicide in May, Robert F. Kennedy Jr. and girlfriend Cheryl Hines attended the 2012 Ripple of Hope gala in New York City last night.

Kennedy's deceased former spouse was apparently driven to take her own life earlier this year amidst increasing financial woes, a bitter divorce battle and upset over his budding relationship with the Curb Your Enthusiasm star.

The gala is held by the Robert F. Kennedy Center for Justice and Human Rights and supports members of the international business, entertainment and activist communities who are committed to social change.

Taylor Swift not only performed at the bash, but was also presented the Ripple of Hope Award as members of ex-boyfriend Conor Kennedy's family looked on with pride.

Later in the evening, T-Swizzle was spotted strolling the streets and holding hands with One Direction beau Harry Styles, who performed Madison Square Garden earlier that night.

Check out the other celebs in attendance in the gallery!

Heidi Klum is definitely a breath of fresh air!

The gorgeous supermodel arrived at Good Morning America rocking black leather pants, a red-embroidered shirt and Christian Louboutin heels. So sexy!

Klum has partnered with American Red Cross to bring toys for the victim's of Hurricane Sandy.

Such a beauty ... inside and out!

When in Amsterdam, Chris Brown apparently likes to get his puff on!

The singer snapped several photos of himself inside a "coffee shop" smoking on what appears to be weed. In fact, in one photo, he has three joints in his mouth.

Brown Tweeted, "dont worry, its medicinal." Gotta love natural medicine.

Rihanna's beau performs at Amsterdam's Ziggo Dome on December 6.

Glen Wilson

Ashton Kutcher does his best Steve Jobs impersonation as he sports a goatee, button-down shirt and jeans in the first official photo for his upcoming film, jOBS.

The 34-year-old actor showed off his stunning transformation into the late Apple founder in this picture released by the Sundance Film Festival. The biopic will be the closing-night film at the festival, which runs from January 17-27 in Park City, Utah.

With his uncanny resemblance and much talked about performance in the role, something tells us he's going to blow audiences away!

Khloe Kardashian looked pretty comfortable in some sunglasses, spandex and a pair of Uggs as she made her way to Miami International Airport on Monday.

The 28-year-old reality star was in town to films episodes of show along with sisters Kim and Kourtney but expressed her excitement on returning home via Twitter.

"I can't wait to get home and be in my own bed!!! Nothing like being at home!!! Best feeling in the world! :)" Khloe tweeted, followed by, "Almost home :) too excited to see my hubby tonight." Sounds like someone misses her baby!

Isn't she lovely?

Taylor Swift stepped out in style, wearing a stunning white coat and dress as she headed to an event in NYC on Monday.

The country singer has been in the press lately as she and One Direction's Harry Styles have slowly become the new it couple in Hollywood. The two, who spent their Sunday in Central Park, seem to be growing closer together. Could this be a match made in pop heaven?

Russell Crowe braved the cold New York City streets Monday night as he was all bundled up heading back to his hotel in Soho.

The 48-year-old actor is currently in town shooting his next flick, Winter's Tale, alongside Will Smith, Jennifer Connelly and Colin Farrell.

Between that and the soon-to-be-released Les Miserables this Christmas, it's obvious that he's been working non-stop!