James Corden Brings Out His Inner Diva With Demi Lovato

Just in case you didn't know, James Corden is really good singer! You probably know that simply from the extremely successful "Carpool Karaoke." There's a good chance every single person in America has seen "Carpool Karaoke" at least once. He uses his singing ability for a number of bits on his show including "Riff-off" where…