Song: 2014's "Shady XV Cypher"
Lyric: "But I may fight for gay rights, especially if the dyke is more of a knockout than Janay Rice/Play nice? Bitch, I'll punch Lana Del Ray in the face twice like Ray Rice, in broad day light in the plain sight of elevator surveillance/'Til her head is banging on the railing, then celebrate with the Ravens"
How controversial was it? Controversial enough to get the entire Internet upset. It doesn't take very much to do that nowadays. But for what it's worth, Em's Ray Rice reference was way worse than Vic Mensa's Ray Rice reference.