VIDEO: May the Fiercest Diva Win! Demi Lovato & James Corden Face Off in Epic 'Riff Off'
On last night's LATE LATE SHOW, when Demi Lovato tookexception to James Corden's claim that divas such as Cher, Aretha and Tina Turner are more fierce than today's divas, the two decide to settle it in a Riff-Off