As of May 2017, how many digital units in the United States has the Jay-Z and Kanye West song that Chauncey Hollis, Jr is best known for sold?
Hit-Boy: Chauncey Hollis, Jr. (born May 21, 1987), better known by his stage name Hit-Boy, is an American record producer, rapper, singer and songwriter from Fontana, California. Hit-Boy:  He is perhaps best known for his production catalog, which includes "Niggas in Paris" by Jay-Z and Kanye West, "Drop the World" by Lil Wayne and Eminem, and the GOOD Music single "Clique", all of which have been certified platinum or higher by the Recording Industry Association of America (RIAA). Niggas in Paris:  As of May 2017, it has sold 5 million digital units in the United States.
5 million