Which 'Saturday Night Live' sketch introduced Wayne and Garth?

Which comedian hosted 'Chappelle's Show' on Comedy Central? Which comedy duo created the sketch show 'Key & Peele'? Which sketch comedy show from the early 1990s featured Jim Carrey and the Wayans family? Which 'Saturday Night Live' cast member famously played "Church Lady"? Which 'SNL' cast members played the Blues Brothers? Which comedian starred as a fictionalized version of himself in 'Louie'? What channel is known for running 'Shark Week' each summer? Which network airs the long-running series 'Pawn Stars'?