Demi Lovato & James Corden Have a Sing-Off With Tunes by Adele, Aretha, Katy Perry & More

Sometimes you have to be a late night talk show host when you just want to be a singer. Such is the life of James Corden, who once again found a way to tap into his true tuneful self by having a "diva riff-off" with Demi Lovato on Wednesday night.

They proceeded to go back and forth through the ages with some Adele and Katy Perry (both by Lovato) and Tina Turner and Aretha Franklin (Corden). Demi managed to slip one of her own songs in, and they wrapped with a classic we won't spoil.