With a debut hit so big they were sometimes billed as the Lobby Boyz, Queen's crew 821 broke in 2015 thanks to their single "Lobby." Members Hoedy, C-Black, and KK DaDon were solo artists who spent a few years working on one another's music, but in 2015 they came together and cut the tracks "Keisha's Story" and "Hoe Life" under the collective name of 821. Their breakthrough came when they dropped the track "Lobby" that same year, and when Diddy became a supporter via his Revolt media network, the track went from regional to national. A remix with Slim Jxmmi of Rae Sremmurd was dubbed the "Lobby Challenge," was released in 2016, and appeared on that year's mixtape, 2821 Reloaded. ~ David Jeffries