Crystal Castles are a Canadian electronic band formed in 2004 in Toronto, consisting of producer Ethan Kath and lyricist and vocalist Alice Glass. Crystal Castles are known for their chaotic live shows and their lo-fi home productions. The duo released many limited EPs between 2006 and 2007, and two eponymous albums in 2008 and 2010 to widespread critical acclaim. Their debut album was included in NME's "Top 100 Greatest Albums of the Decade" list at #39.
Ethan Kath met Alice Glass in Toronto when she was 15. After hearing her sing in a local punk band, Fetus Fatale, Kath asked her to record vocals over tracks he had been working on since 2003. After writing some lyrics, she went to a studio to record them, where her soundcheck was secretly recorded.