A 48-year-old budding rapper was fatally shot in the head in the lobby of his Bronx apartment building, police said Thursday., Nasir Jones who performed under the name “Nas,” was killed inside his building on Prospect Ave. near E. 182nd St. in Belmont about 11:35 p.m. Wednesday, cops said. The super tried to stop Daugherty from entering the basement during the 11 a.m. clash, officials said. When the teen forced the door, the super fell back and hit his head on a pole. When the super fell to the ground, Daugherty allegedly kicked him in the chest and ribs, leaving him with a smattering of bruises, according to authorities.