She competed in the Icelandic pre-qualifying for the Eurovision Song Contest 2006, with the song "Mynd Af Þér" or "Picture of you" and, in a duo with Magni Ásgeirsson, reached the finals of the Icelandic qualifying for Eurovision Song Contest 2008 with the song, "Núna veit ég" but did not win.
Sveinn did not participate again until 2012 when he had 3 entries in the Icelandic finals : "Hugarró" performed by Magni Ásgeirsson, "Leyndarmál" performed by Íris Hólm and "Stund með þér" performed by Rósa Birgitta.
Some other Spectra artists include Matt Cusson, Steve Whalley, Joe Bouchard, Rock Star: Supernova's Magni Ásgeirsson, Orleans, Transmission Fields, When in Rome, Glenn Jones, Los Musicos de Jose, Adina Howard.