Kerplunk is the second studio album by the American rock band Green Day. It was released on December 17, 1991 in the United Kingdom and formally released in the United States on January 17, 1992, by Lookout! Records. It is the band's first album to feature drummer Tré Cool, replacing original drummer John Kiffmeyer, who left the band to attend college following a US tour promoting their debut studio album 39/Smooth. In May 1991, they decamped to Art of Ears Studios in San Francisco, California, to record their next album with Andy Ernst, who co-produced the sessions with band. Six songs were recorded until the proceedings stopped in order for Green Day to resume touring, returning to the studio in September 1991 to finish the work. Characterized as a pop-punk and punk rock album, the songs on Kerplunk dealt with love and frontman Billie Joe Armstrong's subconscious. Some of the tracks also tackled the theme of boredom, while others focused on alienation. The artwork for the album was created by Chris Appelgren and Pat Hynes, based on a story written by Lookout founder Larry Livermore. From Wikipedia (https://en.wikipedia.org/wiki/Kerplun...) under Creative Commons Attribution CC-BY-SA 3.0 (https://creativecommons.org/licenses/...)