She wore the talked-about piece of the night: a 1,399-carat diamond necklace designed by L'Wren Scott.
The Best Actress winner dazzled in a pair of Chopard diamond necklaces (170 total carats!).
She went vintage with a Van Cleef & Arpels Private Collection 61-carat Art Deco necklace.
More than 405 marquise diamonds made up her H. Stern vintage floral necklace.
The Juno star selected a Fred Leighton pearl and rock-crystal chain.