Have you heard this song in #MannequinChallenge videos? The Mannequin Challenge is a hot new craze blowing up online and the song that is featured in all the videos is Rae Sremmurd‘s “Black Beatles” featuring Gucci Mane. Rae Sremmurd is made up of brothers Khalif “Swae Lee” Brown and Aaquil “Slim Jimmy” Brown and the song is featured on their sophomore album SremmLife 2