Chancellor, a singer and popular producer unleashes a fantastic mash-up. The singer unleashes a mash-up of songs by Justin Beiber, Charlie Puth, The Chainsmokers, The Weeknd, Ed Sheeran and plenty more. Popular tracks like “All I Wanna Do,” “Sober,” “The Hills,” “What Do You Mean,” and many more are heard through this awesome mash-up. MASH-UP: What Do You Mean –…