Underclass Hero is Sum 41's fourth studio album and the only record that was released with only three members in the band, since Dave Baksh left a year early to focus on Brown Brigade. The album was first released July 18, 2007 in Japan. It was released under the Island Records label and distributed worldwide by Universal Records, and in Canada by Aquarius Records. This album features more alternative rock songs than their previous albums. Despite the negative reviews, the album gained success on the Canadian and the United States album charts, peaking at #1 on the Canadian Albums Chart and at #7 on the U.S. Billboard 200.