After wow-ing on the red carpet for the CFDA Fashion Awards on Monday, it was back to California for Sophia Bush where she hosted the launch of the Apolis Defend Tomorrow Campaign on Tuesday. The 29-year-old former "One Tree Hill" actress has always been a wholehearted human rights and environmental activist. I've watched Sophia dedicate any spare minute she's had, when she's not acting, to helping others practically for nearly a decade, and now she's lending her support to Apolis with owners and brothers, Shea and Raan Parton. For the event, Sophia kept it casual and chic in a grey and white "Fisherman" striped tank top by Enza Costa that she layered with a navy blazer by Stella McCartney. Her jacket featured gold buttons, which instantly complimented Sophia's cuffed Apolis Brand Wheat Civilian Chinos.