Björn Helge Andreas Lundstedt, born 20 May 1972 in Uppsala, Sweden, is a Swedish singer who first appeared on television as a teenager with the band Stage Four. His breakthrough came in 1998 when he co‑founded the pop‑dance group Alcazar, which achieved a European hit with "Crying at the Discoteque" and later charted with singles such as "This is the World We Live In" (2004). After a brief hiatus, Alcazar reunited in 2007 and continued to release music, including the 2009 entry "Stay the Night" for Melodifestivalen, where they reached the final. Lundstedt pursued a solo career alongside group activities, entering Melodifestivalen on five occasions as a solo act with songs like "Driver Dagg Faller Regn" (1996), "Move" (2007), and "Aldrig Aldrig" (2012), and again with the EP Vicious (2025). His solo single "Aldrig Aldrig" was released on 11 February 2012. Lundstedt has also performed in major Swedish musical productions, notably as Tony Manero in Saturday Night Fever in 2005–2006, and has contributed choreography to several Alcazar performances.