This week was all about...puttin' on the ritz. And the winners are...

Taylor Swift sparkling in a Reem Acra gown at the 2009 CMA Awards. The sequin detailing on this dress is every little girl's fairytale come true.

Kristen Bell in TIBI at the Assassin's Creed II Launch Party. Though from the Spring 2010 collection, the bold, allover black print on this sheath is right on trend for fall.

Jennifer Nettles glowing in a Luisa Beccaria gown. The ruffled detailing along this fishtail train gives the otherwise sophisticated dress a flirty feel.

Lauren Conrad rocking a mini shift dress and Joie Arietta sequined blazer at the Assassin's Creed II Launch Party. This blazer gives the otherwise basic dress instant party potential.

Kristen Stewart wearing a chiffon J. Mendel sweetheart dress at "The Twilight Saga: New Moon" photocall in Paris. While the tomboy doesn't exactly own her look, it is the only one I've seen her in and loved. The ruched bodice and draped skirt take this dress from simple to sensational (reminds me of something Taylor Swift might wear).

Check out more sensational celebrity styles in my Fab Five Looks of the Week lookbook.

Photos (left to right): Jon Kopaloff/FilmMagic; Jesse Grant/WireImage; Jon Kopaloff/FilmMagic; Jean Baptiste Lacroix/WireImage; Pascal Le Segretain/Getty Images