NBC's "Late Night with Jimmy Fallon" With Guests Keira Knightley, Dave Matthews, Michael Buble

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LATE NIGHT WITH JIMMY FALLON -- Episode 742 -- Pictured: Keira... News Photo2010,2012,Arts Culture and Entertainment,Celebrities,Choice,Color Image,Full Length,Indoors,Keira Knightley,Late Night with Jimmy Fallon,Musical Instrument,New York City,Night,One Person,People,Portrait,Season 4,Sketch Comedy,Talkshow,Television Show,USA,Vertical,ViolinPhotographer Collection: NBCUniversal 2012 NBCUniversal Media, LLCLATE NIGHT WITH JIMMY FALLON -- Episode 742 -- Pictured: Keira Knightley during a skit on December 3rd, 2012 -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images)