Mentor and protégé hit the studio together in Beats By Dre latest commercial promoting their Pill and new Pill XL. Kendrick Lamar hits the booth, fine tuning his raps on a new unreleased record off Dr. Dre’s Detox album. Not comfortable with the first playback, Kendrick hits the local barbershop before Dre calls him back with an answer to the problem.

Only time will tell if the lyrical vicious record will release in the near future.

Continue after the jump……

Previously: Kanye West, Drake, Jay Z, Eminem & Kendrick Lamar Make Rolling Stone’s “100 Best Songs of 2013″