Rooney Mara, Amy Adams, Joaquin Phoenix, and Olivia Wilde step out for the premiere of Her.; Grace Jones performs for guests like Chelsea Handler, Zoe Saldana, Kelly Osbourne, and Goldie Hawn at the amfAR Inspiration Gala; Mark Zuckerberg, Lana Del Rey, Conan O'Brien, and Kevin Spacey attend the Breakthrough Prize Inaugural Ceremony in Mountain View—catch up on Thursday's star-studded soirees in this edition of Last Night's Parties.
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