Jennifer Aniston has been known since her "Friends" days as a trendsetter.

I mean, who did not ask for "The Rachel" hair cut back in the 90s?

But nowadays it seems as if Aniston is more risque these days - choosing plunging necklines and leather over floral prints and loose fits.

On Oct. 17 she was recognized at Elle's 18th Annual Women in Hollywood Tribute in L.A. and wore a plunging, gunmetal, sparkinling mini dress. All eyes were certainly on her.

Gone is the girl next door and in her place is a refined rebel.

Maybe it all began after her notorious divorce from Brad Pitt in 2005.

How could a girl not feel (and start to look) a little more jaded?

Back when she was married, she opted for subtler, more casual looks.

Now, with her new boyfriend Justin Theroux, Aniston is holding nothing back. She is embracing trends like motorcycle boots, chunky jewelry, and skimpier dresses. And, of course, she makes sure to show off that hot body of hers.

It is style evolution. Only the strong survive.

Jennifer Aniston's style evolution from 1997 to today. A transformation from sweet girl next door to daring fashion rebel.

Jennifer Aniston, the star of the new 20th Century Fox movie "Picture Perfect," attends a party at New York's CoCo Opera restaurant with youthful layered hair and a floral print dress.

Jennifer Aniston looks young and coy at the "The Object of my Affection" premiere in Los Angeles April 9.

Posing with ex-husband Brad Pitt, Aniston looks hippie-chic in a long skirt and psychedelic-patterned top.

Today's Jennifer Aniston would probably never choose this shapeless, coral piece. Here she presents the Outstanding Lead Actor in a Comedy Series Emmy at the 52nd annual Emmy Awards.

Here she wears very simple casual wear. Although it shows off her physique, the outfit is plain.

Actress Jennifer Aniston displays her award at the 54th annual Emmy Awards in Los Angeles September 22, 2002. Aniston won Outstanding Lead Actress in a comedy series for her work on "Friends."

Looking buttoned-up and demure, U.S. actress Jennifer Aniston arrives for the UK premiere of 'Along Came Polly' in central London. Unfortunately, the movie was a box office flop.

Actress Jennifer Aniston arrives at the 78th annual Academy Awards in Hollywood in a very simple black gown.

Jennifer Aniston poses at the Los Angeles premiere of the film 'Friends with Money' in Hollywood. The long cut of this dress, the dark color, and the sleeves all combine to make this a rather matronly look.

At the premiere of her hit film "The Break-Up," Aniston wears a halter dress with sexy cut-outs, shortly after her real-life break up with Brad Pitt.

In a far more modern all-black outfit than she used to wear, Actress Jennifer Aniston arrives at the 18th annual GLAAD Media Awards at the Kodak theatre in Hollywood.

Jennifer Aniston flaunts it for the photographers at the Women in Film 2009 Crystal and Lucy Awards in Century City in a shimmering metallic dress and strappy sandals.

Actress Jennifer Aniston poses at the premiere of her new film "Love Happens" in Los Angeles in a gorgeous mini dress that shows off her fabulously toned legs.

Cast member Jennifer Aniston arrives for the premiere of the film "The Bounty Hunter" in New York.

Jennifer Aniston displays a bottle of her fragrance "Jennifer Aniston " during a photo-call as part her promotional activities in Mexico City in a sparkly one-shouldered dress.

Jennifer Aniston poses at the premiere of Horrible Bosses at the Grauman's Chinese theatre in Hollywood.

Aniston poses during a media event to promote her latest movie "Horrible Bosses", at a hotel in London wearing a leather sheath dress.

Actress Aniston arrives for a screening of the Lifetime Original movie "Five" in Washington dressed in a stylish all-black ensemble.

Show stopper. Jennifer Aniston makes jaws drop at Elle's 18th Annual Women in Hollywood tribute. The svelte stunner works a gunmetal gray sequined dress with plunging neckline.