"All Day" has been the song people's been bumping at retail stores, car stereos, and mobile devices lately. But there's a chance you will hear a remix featuring Kendrick Lamar. According to Pigeons & Planes, the verse is an extended version of a brief six-second clip that leaked earlier this week. There has been no announcement of an official remix but if you happen to see Kendrick featured, don't be surprised. You heard it first.