Jennifer Aniston Sexy At Spike TV Guys Choice Awards With Ex Bradley Cooper [Video & Sexy Gif]

Jennifer Aniston looked sexy and svelte in a form-fitting black dress during this weekend's Guy's Choice Awards where she roasted Jimmy Kimmel before giving him the "Funniest M.F." award.

Spike TV's Guy Choice Awards in Culver City, California on Saturday night featured plenty of lovely stars, both male and female.

Bradley Cooper hobnobbed with actress Amy Adams and even cuddled up to ex-girlfriend and the soon-to-be wife of writer and actor Justin Theroux, Jennifer Aniston.

Katherine Webb, Jessica Alba, Olivia Wilde and fiancé Jason Sudeikis, Dwight Howard and Russell Crowe were also in attendance on Saturday night.

Alba was in a form-fitting yellow dress that showed off her tanned legs and curves.

But it was Aniston who was the sexiest starlet of them all in a flawless black dress and new hairdo.

Gone is the "Rachel" cut she had on NBC's "Friends," despite it's popularity at salons for years after she made it fashionable to look bouncy and flouncy as the girl next door.

The 44-year-old actress sported a deep side parting with an intricate braid across the left side of her head at a Hollywood bash this weekend.

Aniston looked stunning as the Horrible Bosses star wore a strapless black frock with trailing black and pink side train for the night's awards.

The sexy star of the upcoming "We're the Millers," was up on stage to present the "Funniest M.F." award to friend, Jimmy Kimmel, who is preparing to wed fiancé, Molly McNearney.

But Aniston was more roaster than award giver, making fun of Kimmel's humble engagement, in comparison to her own much gossiped about nuptials to Theroux, and also his job performance as the host of ABC's Jimmy Kimmel Live, which is now airing at the comeptitive 11:30 p.m. time slot.

"Jimmy, you've got a lot going on in your life," Aniston said. "Like me you got engaged this year. Unlike me, nobody cares."

She wasn't done there, though, as the sexy Aniston next took a dib at Kimmel's ability to attract top talent to his show:

"Jimmy, what a year you've had. You got to host the Emmys," Aniston said. "Must be fun to finally meet all the stars who won't do your show."

Jennifer Aniston just keeps getting sexier with age.