The biggest names in Hollywood came out for the Oscars Saturday night, but not the Oscars you're thinking about. It was the 12th annual Breakthrough Prize ceremony -- also known as the “Oscars of Science” -- which drew a boatload of A-listers such as Anne Hathaway , Robert Downey Jr. , Zoe Saldana , Ben Affleck , Paris Hilton , Margot Robbie , Lionel Richie , Michelle Yeoh , Rob Lowe , John Legend and Chrissy Teigen . The list didn't stop there. You also had Jessica Chastain , Christina