Los Angeles producer DJ Mustard has been laying down beats for some of the biggest rap hits this decade, working with artists like YG, T.I., French Montana, Big Sean, Jeremih, Tyga, 2 Chainz, and Ty Dolla $ign. The common denominator between many of his biggest hits is the signature “hey” vocal chant that populates the background. From Ty’s “Paranoid” featuring B.o.B to Tyga’s “Rack City” to Big Sean’s “I Don’t Fuck With You,” Mustard has used these heys to build the beats of many Top 10 hits.