Producer-rapper Hit-Boy has been busy this year. He teased a possible upcoming Jay-Z and Nas collaboration album in May, and has been working in the studio with Benny The Butcher and Freddie Gibbs. He also appeared on Sada Baby’s “Little While” and dropped the video for his track “Salute” with Big Sean and Fivio Foreign.Now Hit-Boy has dropped a new track titled “Back In Traffic” exclusively via Apple Music, featuring KIRBY. Hit-Boy disclosed on social that Kendrick Lamar helped craft the lyrics and melody saying: “Lyrics/melody written by Kendrick Lamar, brought to life by [KIRBY]. Can’t thank y’all enough.”Check out “Back In Traffic,” available exclusively on Apple Music.