Bonnie Somerville (born February 24, 1974) is an American actress and singer. She has had roles in a number of movies and television series, most notably "NYPD Blue", "Grosse Pointe", "Friends", "The O.C.", "Cashmere Mafia", Kitchen Confidential, Without a Paddle, and "Golden Boy". She starred as Dr. Christa Lorenson in season one of the CBS medical drama "Code Black".