"Pandemonium" captures the electrifying energy of Pet Shop Boys' live performance at the O2 Arena in London on December 21, 2009. This live album, released on February 12, 2010, under Parlophone UK, is a thrilling journey through the synthpop and new wave legends' discography, spanning a dynamic hour and thirteen minutes. The setlist is a masterclass in Pet Shop Boys' hit-making prowess, featuring iconic tracks like "West End Girls," "It's a Sin," and "Always on My Mind," alongside fan favorites such as "Love etc." and "Did You See Me Coming?" The album also showcases the band's knack for medleys, with a standout performance of "Se a Vida E / Discoteca / Domino Dancing / Viva la Vida." "Pandemonium" is not just a concert recording; it's a testament to Pet Shop Boys' enduring appeal and their ability to deliver unforgettable live performances. The album is a treat for both longtime fans and newcomers, offering a chance to experience the Pet Shop Boys' unique blend of electronic music and clever lyrics in a live setting.