Parties! The style, stars and scoop from Hollywood's hottest events

Kate Walsh showed off her sexy back when she arrived at the Art of Elysium gala, held at cathedral-turned-party hot spot Vibiana in Los Angeles. Rachel Bilson, Courteney Cox and Ellen DeGeneres also put on their best black tie attire to celebrate the 10th anniversary of the organization, which encourages actors to donate their time and talents to better the lives of critically ill children.