NBC's "The Tonight Show with Jay Leno" - Season 21

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THE TONIGHT SHOW WITH JAY LENO -- Episode 4391 -- Pictured: Bob... News Photo2010,Adult,Adults Only,Arts Culture and Entertainment,Bob Costas,Burbank,California,Color Image,Indoors,Night,One Man Only,One Person,People,Portrait,Television Show,The Tonight Show with Jay Leno,USA,VerticalPhotographer Collection: NBCUniversal 2013 NBCUniversal Media, LLCTHE TONIGHT SHOW WITH JAY LENO -- Episode 4391 -- Pictured: Bob Costas on January 18, 2013 -- (Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)