Justin Bieber, Pineapple Pen singer to star in SoftBank ad
Canadian pop singer Justin Bieber will star with Pen-Pineapple-Apple-Pen singer Piko-Taro in a commercial for Japanese technology company Softbank. A behind the scenes video from the commercial has emerged online, which shows the two in a classroom set up. Bieber previously called the PPAP song his "favourite video on the Internet" in a tweet. 