Currently on the BET Music Matters Tour, Kendrick Lamar made it an even more memorable show in San Diego this past Wednesday by previewing not one, but two, new tracks from his eagerly anticipated debut album, good kid, m.A.A.d city (out Oct. 22). The first we hear in the clip is "Bitch, Don't Kill My Vibe," a thumping, mellow number, and later a menacing bass-smothered banger, which sounds like it could be the Hit-Boy-produced "Backseat Freestyle" ("Start up that Maserati/ Vroom, vroom! I'll race you," suggests so). Get a listen below.