Canadian pop star Justin Bieber performed a show Tuesday for children in Tacloban City who survived typhoon Haiyan in the Philippines, ABS-CBN News said. "About to go perform the last #believetour show. The real last one and the most important one of the tour. #GiveBackPhilippines," Bieber tweeted before the mini-concert. Bieber also said via Twitter he has seen first-hand the devastation the storm caused and he urged his followers to do whatever they can to help those impacted by Haiyan