Turn It Up: Kelly Clarkson, Meghan Trainor, John Oliver & More Sing "Since U Been Gone”
Marcus Mumford is the Grammy Award-winning singer-songwriter, musician and lead singer of the band Mumford & Sons. The group has released three albums since 2009, two of which topped the Billboard 200 albums chart and the third reached No. 2. Additionally, Mumford also produced the music for the 2013 film Inside Llewyn Davis.