People magazine has released its list of 10 Best Dressed, with Catherine, Duchess of Cambridge the only non-American to make the list.

Gossip Girl star Blake Lively topped the list of women chosen for "taking fashion up a notch this year".

Also deemed worthy for their fashion sense were movie stars Jennifer Aniston, Reese Witherspoon, Jennifer Hudson, Jessica Alba, Mila Kunis and singer Jennifer Lopez.

While Catherine, formerly Kate Middleton, has been touted as a fashion star by many since her marriage to Prince William earlier this year, some of that shine may be wearing off.

In recent weeks many fashion luminaries have questioned Catherine's status as a trendsetter, calling her instead a "trend-follower".

Gregg Andrews, a fashion director at leading US department store chain Nordstrom said she wouldn't be looked at twice if she wasn't a royal.

"She is stylish, but she's not setting trends, she's following trends," Andrews told the Daily Mail.

"If you take Kate out of the royal family, put her on a street in New York, you wouldn't look at her twice. She's a beautiful woman, but she blends into a crowd."

Nevertheless her elegant style does appeal to some designers wanting to cater to a more conservative consumer mindset, with her "classically patrician look".