BEYONCÉ VS. OLIVIA
The star arrived at a Madrid award ceremony in her black Reem Acra gown in December, while the House actress made our Best Dressed list for the Golden Globes in her violet version.


LAKE VS. TARAJI
The Over My Dead Body costar heated up the film's premiere in her Kaufman Franco dress, while the Curious Case of Benjamin Button actress flaunted her curves in her structured silver strapless at the Critics' Choice Awards.


KATHARINE VS. GARCELLE
The singer paired her Karen Zambos dress with gold accessories at the Elle Women in Hollywood Tribute, while the new mom belted her green dress at the InStyle Diamond Fashion Show preview in L.A.


TAYLOR VS. LISA
The country star attended the CNN Heroes gala in her Trina Turk dress, while the actress promoted her exercise video in the black-and-white frock.


KATE VS. HEIDI
The actress paired her Chloé shorts with a matching blazer from the French line at a Blackberry party in October, while the reality star topped her scalloped shorts with a sheer shirt and cardigan for a stroll in L.A. this weekend.


LAURA VS. ALICIA
The Golden Globe winner celebrated the Critics' Choice Awards in her Malandrino gown, while the Law & Order: Criminal Intent actress attended an inaugural gala in her color-blocked one.


GABRIELLE VS. LISA
The BET Honors host was glam in her black Reem Acra gown, while the House doctor sizzled in her red one-shouldered version at the SAG Awards.



AMERICA VS. KELLY
The Ugly Betty star was chic in her Diane von Furstenberg dress at the ALMA Awards, while the British TV host added a nautical touch to her black-and-white frock at the International Boat Show in London.


DIANE VS. MARISA
The actress pairs her ivory Giambattista Valli dress with maroon heels for a Parisian premiere, while the Oscar nominee hit an inaugural gala in the black version of the full-skirted frock.


RIHANNA VS. ROSARIO
The singer stunned in her emerald green Dolce & Gabbana gown at the World Music Awards in Monaco in 2007, while the actress dazzled at the SAG Awards in her champagne version this week.