Lars Winnerbäck is one of the most popular Swedish singers/songwriters of the last decade. He started off with a folk-pop sound but moved towards rock in the late 90's. In his most recent work he has again moved towards a more acoustic style. Originally from Linköping, he later moved to Stockholm to help his career take off. Both cities are frequently featured in the lyrics of his songs.
And a little bit more description from Wikipedia:
Lars Mattias Winnerbäck (born October 19, 1975), often called Lasse, is a Swedish singer and songwriter.