Sons of Angels are a Norwegian/Swedish Rock Band (William-Olsson is Swedish) from 1990. They released their first self-titled album in 1990 on May 11. They weren't very well known but their first record managed to sell over 150 000 copies. They had a bit of success with the album's single and first track - "Cowgirl" - they also made a music video of that song. They returned in 2001 with a 2nd album - "Slumber With The Lion".