New Delhi, Sept 23 (ANI): David Hasselhoff has confessed he had "a lot of fun" working with Justin Bieber and that he is a "cool" guy. The ' Baywatch' star, who was on the set of the popstar's latest video, told a leading Magazine that people will hear more about their collaboration, but currently they are just keeping it quiet because it's really a cool video, and they had a blast. Bieber had earlier confirmed the collaboration Sunday night on Twitter.