Chamberlin was reunited with the band in 1999. In 2000, they released "Machina/The Machines of God", a concept album on which the band deliberately played to their public image. Critics were again divided, and sales were lower than before; "Machina" is the second lowest-selling commercially released Smashing Pumpkins album to date, with U.S. sales of 583,000 units up to 2005. During the recording for "Machina", Wretzky quit the band and was replaced for the upcoming tour by former Hole bassist Melissa Auf der Maur. In 2000 the band announced they would break up at the end of the year, and soon after released "Machina II/The Friends & Enemies of Modern Music" free over the Internet. The Smashing Pumpkins played their last show on December 2, 2000, at the Cabaret Metro.