This week was all about sexy cutouts and girly glam. And the winners are...

Taylor Swift in Elie Saab at the 2011 Billboard Music Awards. While not completely out of her element (she did wear sequins after all), Taylor definitely exuded a high level of sophistication in this rose-colored, strapless gown.

Rihanna in Max Azria at the 2011 Billboard Music Awards. Rihanna is known for pulling out all the stops on the red carpet (and practically everywhere else), but she looked refreshing (and sensational) in this simple, white blouse, blazer and pant ensemble, which she topped off with neutral pumps.

Katie Holmes in Holmes & Yang at the 56th Annual Drama Desk Awards. Don't call it a comeback, but Katie, who's been known to take long hiatuses from the red carpet every now and again, has recently returned to the spotlight looking more beautiful than ever. This bowed and pleated magenta creation is just the icing on the cake.

Fergie in BCBG Max Azria at the 2011 FiFi Awards. Fergie took a break from the leather and cutouts to be a lady in this sparkle-clad, lemon-custard-colored gown, which she accented with a bold, blue clutch.

Selena Gomez in Dolce & Gabbana at the 2011 Billboard Music Awards. Selena, whose style is typically conservative and on the girly side, showed off her wild side in this sexy, cutout gown and strappy red stiletto heels.

Photos (left to right): Kevin Mazur/WireImages; Michael Tran/FilmMagic; Bruce Glikas/FilmMagic; Brian Ach/WireImage; Isaac Brekken/Getty Images