What rapper from Harlem appears on 12?
12 (ASAP Twelvyy album):  The album features guest appearances from Joey Badass, Telana, Flatbush Zombies, Fredro Starr, ASAP Rocky, ASAP Ferg, ASAP Ant and ASAP Nast. ASAP Ferg: Darold D. Brown Ferguson, Jr. (born October 20, 1988), better known by his stage name ASAP Ferg (stylized A$AP Ferg), is an American rapper from New York City's Harlem neighborhood.
i don't know