"Cornerstone" is a song by the English indie rock band Arctic Monkeys, released as the second single from their third album Humbug. It was released on 16 November 2009. Like the previous single "Crying Lightning", the vinyl was made available in Oxfam shops. Alex Turner told Uncut magazine that he wrote this song, "one morning, quite quickly." He added: "There's something to be said for writing in the morning. At other points in the day you're a bit more defensive. I saw it as a challenge to write something in a major key, but that wasn't cheesy." It was originally written in the key of A Major. In October 2013 it was sampled by the rapper Dom Kennedy for the song "Pleeze" on his album Get Home Safely.