Kendrick Lamar‘s ‘Good Kid, M.A.A.D City’ is now the longest-charting hip-hop album in US chart history.The Compton rapper’s breakthrough second studio album was released in October 2012, and featured such songs as ‘Backseat Freestyle’, ‘Poetic Justice’ and ‘Bitch, Don’t Kill My Vibe’.As Chart Data points out, ‘Good Kid, M.A.A.D City’ has now spent 400 weeks on the Billboard 200 album chart in the US — making it the longest-charting hip-hop studio album in US chart history..@kendricklamar's