credits band tyson ritter -- vocals , bass nick wheeler -- lead guitar mike kennerty -- rhythm guitar chris gaylor -- drums additional roles keyboards by kevin saulnier violin on '' fallin ' apart '' by anton patzner angelic choir on '' fallin ' apart '' and '' real world '' by charlotte ritchie gang vocals on '' gives you hell '' by the all-american rejects , jeff sosnow , trevor whatever , brad cole , lonn friend , and seth howard vocals on '' another heart calls '' by catherine & allison pierce .