Giuliana Rancic
(Invision/AP Images)

Justin Timberlake (Invision/AP Images)

Peter Facinelli (Invision/AP Images)

Eddie Redmayne (Invision/AP Images)

Ben Affleck (Invision/AP Images)

Bradley Cooper (Invision/AP Images)

Cory Monteith (Invision/AP Images)

John Krasinkski (Invision/AP Images)

Javier Bardem (Invision/AP Images)

Liev Schreiber (Invision/AP Images)

Darren Criss (Invision/AP Images)

Mark Salling (Invision/AP Images)

Lea Michele wore a Valentino dress, Jennifer Meyer jewelry, Jimmy Choo shoes, and carried a Fendi bag. (AP/Invision)

Anne Hathaway wore a Giambattista Valli couture dress, custom vegan Jimmy Choo shoes, Kwiat jewels, and an Eddie Parker clutch (AP/Invision)

Sofia Vergara wore a white Donna Karan Atelier gown (AP/Invision)

Nina Dobrev in Elie Saab (AP/Invision)

Jessica Chastain in Alexander McQueen and Harry Winston jewels (AP/Invision)

Naya Rivera (AP/Invision)

Naomi Watts in Marchesa (AP/Invision)

Amanda Seyfried in Zac Posen (AP/Invision)

Jennifer Garner in Oscar de la Renta (AP/Invision)

Michelle Dockery (Getty)

Kerry Washington in Rodarte (AP/Invision)

Marion Cotillard in Dior (AP/Invision)

Nicole Kidman in Vivienne Westwood (AP/Invision)

Maria Menounos (AP/Invision)

Julia Stiles (AP/Invision)

Jordin Sparks (AP/Invision)

Carmen Electra (AP/Invision)

Claire Danes in Givenchy (AP/Invision)

Jennifer Lawrence in a Dior gown and Chopard jewels (AP/Invision)

Kaley Cuoco (AP/Invision)

Julianne Moore in Chanel couture (AP/Invision)

Sarah Hyland (AP/Invision)

Giuliana Rancic (Getty)

Tina Fey in Oscar de la Renta (AP/Invision)

Frieda Pinto (AP/Invision)

Alfre Woodard (AP/Invision)

Busy Phillips (AP/Invision)

Jenna Fischer (AP/Invision)

Gabby Douglas (AP/Invision)

Kate Flannery (AP/Invision)

Helen Hunt (AP/Invision)

Amy Pohler (AP/Invision)

Angela Kinsey (AP/Invison)

Jessica Pare (AP/Invision)

Vitalie Taittinger (AP/Invision)

Jaimie Alexander (Invision/AP Images)

Kelly Osbourne in Jenny Packham (Getty)