Melissa McCarthy has signed on to host the children's talent show, "Little Big Shots," NBC said Sunday. Fresh episodes of the program are scheduled to air on Sunday nights after football season ends this winter. Comedian Steve Harvey hosted the first three seasons of the series. Variety said Harvey's exit follows the cancellation of his talk show, "Steve," which was syndicated by NBCUniversal. "Melissa's just an incredible performer and incredible comedian," Paul Telegdy, co-chairman of entertainment for NBC, said of the "Bridesmaids" and "Ghostbusters" star's replacement of Harvey. "She will bring a completely fresh perspective to it."