Nikki Reed, Jordana Brewster, and other starlets celebrate Marie Claire's May cover stars Lupita Nyong'o, Kate Mara, and Elle Fanning at the Fresh Faces party; Kim Kardashian, Nicole Richie, and Katy Perry show support for congressional candidate Marianne Williamson at a press event; Samantha Ronson fetes Kate Hudson's The Little Black Dress collection for Ann Taylor—get all of this and more from L.A.'s busy Tuesday in this edition of Last Night's Parties.