Sebastian Karlsson, or Sebastian (born 2 January 1985), is a Swedish singer and performer, best known for his participation in Idol 2005, where he came in second place after Agnes Carlsson.
His first studio album, Sebastian, produced by Peter Kvint and released on March 1, 2006, sold 30,000 copies (IFPI Sweden Gold), with two singles: Do what you're told (Swedish Chart Nr. 1 in February) and Indifferent (Swedish Chart Nr. 38 in May).
Now he is recording his second album, The Vintage Virgin, that will be released in 2007. It is a more personal album, composed by Sebastian and Peter Kvint, with Helena Josefsson as background singer. Words and violence is the first single of The Vintage Virgin.