NBC's "Tonight Show with Jay Leno" With Guests Katy Perry, Chris Collinsworth, Kacey Musgraves

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THE TONIGHT SHOW WITH JAY LENO -- -- Episode 4504 -- Pictured: Host... News Photo2010,Arts Culture and Entertainment,Behind The Scenes,Burbank,California,Celebrities,Choice,Color Image,Horizontal,Indoors,Katy Perry,Night,Portrait,Singer,Talking,Television Show,The Tonight Show with Jay Leno,USAPhotographer Collection: NBCUniversal 2013 NBCUniversal Media, LLCTHE TONIGHT SHOW WITH JAY LENO -- (EXCLUSIVE COVERAGE) -- Episode 4504 -- Pictured: (l-r) Host Jay Leno talks with singer Katy Perry during a commercial break on July 26, 2013 -- (Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)