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Harry Styles in an ugly Christmas sweater. What more do you need?
U2 may not have been able to perform on The Tonight Show Monday, but that didn't prevent t…
Ryan Reynolds; Terrence Howard. Also: Kelly Clarkson performs.
Judi Dench; Ansel Elgort. Also: GZA performs with Tom Morello.
Danny DeVito; Zoe Kravitz; Whitney Cummings.
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