NBC's "The Voice" - Episode 507

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Adam Levine, CeeLo Green, Christina Aguilera, Blake Shelton -- News Photo2010-2019,2013,Adam Levine - Singer,Arts Culture and Entertainment,Blake Shelton,California,Cee-Lo,Choice,Christina Aguilera,City Of Los Angeles,Color Image,Horizontal,Indoors,Reality TV,Season 5,Television Show,The Voice - Television Show,USAPhotographer Collection: NBCUniversal 2013 NBCUniversal Media, LLCTHE VOICE -- 'Battle Rounds' -- Pictured: (l-r) Adam Levine, CeeLo Green, Christina Aguilera, Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)