James Corden casually fills in as a backing dancer for Taylor Swift

3:40am PST - December 8th, 2017    demi lovato - Mashable

If James Corden ever gets fed up with hosting a talk show, he's definitely got a future in managing large music venues. SEE ALSO: Kelly Clarkson's 'Carpool Karaoke' has a surprise guest appearance In the sketch above, Corden takes over from the general manage…