We're not sure how they did it, but somehow Rihanna and Miley Cyrus narrowly avoided nip slips while attending the amFAR gala in Los Angeles last night. The mega stars donned barely-there gowns designed by Tom Ford and bid on fancy prizes —Rihanna reportedly dropped $135,000 on diamond earrings from Harry Winston and an Elizabeth Taylor portrait by Willy Rizzo—all to benefit the international non-profit's AIDS research and HIV prevention efforts. The night's festivities came on the heels of Miley's debut as a spokesperson for MAC Viva Glam, a charitable line for the makeup brand that puts 100 percent of its sales toward helping those living with and affected by AIDS. Miley joins a philanthropic crew of brand ambassadors that already includes Rihanna, Lady Gaga, and Nicki Minaj. Check out photos from the event below, stay tuned for Miley's MAC Viva Glam collection, which drops next January, and grab a sneak peek at what could possibly be Rihanna's leaked album tracklist here.
Lead image: Christopher Polk/Getty Images