All About Chemistry is the third studio album by American rock band Semisonic, released on March 13, 2001, through MCA Records. With this release, the band failed, at least in America, to capitalize on the momentum it had generated with the song "Closing Time" from their previous album, Feeling Strangely Fine. This had a softer edge than Feeling Strangely Fine and was not as popular with the fans. By 2002, the album had sold 58,000 copies, and its poor sales partially led to the band going on an unofficial hiatus. However, it has a five star rating by Q Magazine. The track "Chemistry" was featured on the soundtrack for 40 Days and 40 Nights.