DETROIT (AP) – Singer Nate Ruess (ROOS) of fun. has been studying Coldplay and U2 to figure out how they put their set lists together. Ruess says he spent his monthlong vacation figuring out which new songs to play. He says he got heavy into Coldplay and U2 and how they choose songs and do light shows. Ruess says his favorite thing about success is that fun. can play bigger venues and use bigger production. He says they now employ Coldplay’s lighting director.