Tegan & Sara (3/25) Live at the Riverside By Jeff Matthias Mar. 25, 2010 Facebook Twitter Google plus Linkedin Pinterest The sister duo of Tegan and Sara are coming to perform in Milwaukee! Tegan and Sara are set to perform at the Riverside on Thursday, March 25 at 8:00 pm. The Shepherd Express is sponsoring this unique pop duo. Get your tickets early, click here.