By Cara Sanders
Photo: Kevin Tachman/Getty Images for amfAR1/13Tom Ford and Justin Timberlake
Photo: Kevin Tachman/Getty Images for amfAR2/13Alessandra Ambrosio in Zuhair Murad and Cristina Ortiz jewelry
Photo: Kevin Tachman/Getty Images for amfAR3/13Gwyneth Paltrow in Tom Ford and Harry Winston jewelry and Ryan Murphy
Photo: Kevin Tachman/Getty Images for amfAR4/13Sharon Stone
Photo: Kevin Tachman/Getty Images for amfAR5/13Miley Cyrus in Tom Ford and Dita Von Teese in Ulyana Sergeenko Couture
Photo: Kevin Tachman/Getty Images for amfAR6/13Lea Michele in Versace and Jennifer Meyer jewelry
Photo: Kevin Tachman/Getty Images for amfAR7/13Natasha Bedingfield and Rihanna in Tom Ford and Neil Lane earrings
Photo: Kevin Tachman/Getty Images for amfAR8/13Camilla Belle in Carolina Herrera
Photo: Kevin Tachman/Getty Images for amfAR9/13Beth Behrs in Patricia Bonaldi, Kristin Davis in Monique Lhuillier, and Kat Dennings in Rubin Singer
Photo: Kevin Tachman/Getty Images for amfAR10/13Milla Jovovich in Donna Karan
Photo: Kevin Tachman/Getty Images for amfAR11/13Jesse Metcalfe and Cara Santana
Photo: Kevin Tachman/Getty Images for amfAR12/13Lisa Kudrow
Photo: Kevin Tachman/Getty Images for amfAR13/13China Chow