Alcazar is a Swedish nu-disco group established in Stockholm. It is one of Sweden's most successful music groups both nationally and internationally with a string of hits since their debut single in 1999. Worldwide, Alcazar sold over 12 million records between 2001 and 2004. Alcazar also had success globally in 2000 with their song "Crying at the Discoteque", having charted in USA, Brazil, Australia, Japan and most countries in Europe.

Björn Helge Andreas Lundstedt is a Swedish singer, best known as a member of the pop-dance group Alcazar.