Rosario Dawson, America Ferrera, Diego Luna, and more step out for the Cesar Chavez Foundation's 2014 Legacy Awards Dinner; Rachel Zoe, Joe Jonas, Emma Roberts, and other fashionable stars attend a swanky dinner party honoring designer Nicholas Kirkwood at Hotel Bel-Air; Julia Louis-Dreyfus and her "Veep" costars hit PaleyFest—see who was out and about Thursday in this edition of Last Night's Parties.