Weezer (also known as The Green Album) is the third studio album by Weezer, released on May 15, 2001. Produced by Ric Ocasek, this is the only Weezer album to feature bassist Mikey Welsh, who replaced Matt Sharp. The album is grounded in the power pop genre, featuring strong melodies, crisp vocal harmonies, and prominent guitar riffs. It is also Weezer's quickest-selling album. The album was often recognized as a rebirth for the band, after a five-year hiatus following their 1996's album Pinkerton. Three singles were released from the album, including "Hash Pipe," "Island in the Sun," and "Photograph."