NBC's "The Tonight Show with Jay Leno" With Guests Christina Aguilera, Joy Behar, Valerie June

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THE TONIGHT SHOW WITH JAY LENO -- Episode 4531 -- Pictured: Singer... News Photo2010,Arts Culture and Entertainment,Burbank,California,Celebrities,Christina Aguilera,Color Image,Horizontal,Indoors,Interview,Jay Leno - Television Host,Media Interview,Night,Portrait,Singer,Television Host,Television Show,The Tonight Show with Jay Leno,USAPhotographer Collection: NBCUniversal 2013 NBCUniversal Media, LLCTHE TONIGHT SHOW WITH JAY LENO -- Episode 4531 -- Pictured: (l-r) Singer Christina Aguilera during an interview with host Jay Leno on September 18, 2013 -- (Photo by: Margaret Norton/NBC/NBCU Photo Bank via Getty Images)