Platinum-selling singer-songwriter Olivia O’Brien, a former Napa resident, will headline a North Bay Fires benefit show on Dec. 11 at Gunlach Bundschu Winery in Sonoma. Olivia O’Brien 7:30 p.m., Dec. 11 Shoreline Old Red Barn at Gunlach Bundschu Winery, Sonoma Tickets: $15. O’Brien, who has written three multi-platinum songs, began a quick rise…