During his show open, James Corden proclaimed divas of the past superior to divas of today and Demi Lovato had something to say about that.
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In the video above, Lovato and Corden sing their hearts out with the accompaniment of YouTube a cappella group Levels. Lovato belts out songs by Adele and Katy Perry, and Corden bites back with some of Tina Turner and Aretha Franklin's greatest hits.
The battle came to a victorious end when Lovato sang her own song, "Heart Attack." Demi won the battle, but the war came to a draw with both deciding that divas then and now are both fab. Read more...
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