When Brody's hyper-competitive ex-girlfriend from business school, Heather (guest star ANNA CAMP -- Pitch Perfect, The Help, True Blood), comes back into the picture, Jenny's worried that Heather is a better match for Brody than she is. When they all take the stage for karaoke, the sparks begin to fly. Meanwhile, Mansfield realizes that his office has become a boys' club and decides to get in touch with his feminine side.