Jimmy plays a mashup of NBC News anchor Brian Williams rapping Snoop Dogg's verse from the classic Dr. Dre song "Nuthin' but a 'G' Thang." Subscribe NOW to Late Night with Jimmy Fallon: http://full.sc/IcjtXJ Watch Late Night With Jimmy Fallon Weeknights 1235/11:35c Get more Jimmy Fallon: Follow Jimmy: http://Twitter.com/JimmyFallon Like Jimmy: https://Facebook.com/JimmyFallon Get more Late Night with Jimmy Fallon: http://LateNightWithJimmyFallon.com/ Follow Late Night: http://Twitter.com/LateNightJimmy Like Late Night: https://Facebook.com/LateNightWithJim…