Det svär jag på " is a song written by Lena Philipsson and Torgny Söderberg , and performed by Arvingarna at Melodifestivalen 1999 , where it ended up third . It was also released as a single . The song was originally thought to have been performed by Lena Philipsson herself
Melodifestivalen 1999
Melodifestivalen 1999
Det svär jag på