Demi Lovato was a guest on The Late Late Show with James Corden last night, where she challenged him to a good old “A Cappella Diva Riff-Off.”

The two sang hits from diva superstars Adele, Cher, Aretha, Tina Turner and Katy Perry!

Who do you think ‘won’?

Filed under: demi lovato, james corden, the-late-late-show-with-james-corden