The CW stars Rachel Bilson and Sophia Bush celebrated The Art of Elysium's Heaven Gala in Los Angeles this weekend in fittingly ethereal looks. The Hart of Dixie actress chose a floaty Chanel dress, while her One Tree Hill pal picked a Chris Benz design and threw on a floral hair wreath. "#Heaven it certainly was. 50,000 kids helped. So much $ raised," Bush Tweeted after the event. See Emma Stone, Viola Davis, and more stars at this weekend's hottest parties in the gallery!