1. Teitur Lassen has additionally produced, written for, or worked with multiple international artists including Seal, Corinne Bailey Rae, Netherlands Wind Ensemble, Emilie Simon, International Contemporary Ensemble, Holland Baroque Society, Nolwenn Leroy, Nico Muhly, and Ane Brun.
Teitur Lassen's songs have appeared on major motion picture soundtracks and numerous compilations.
Teitur Lassen continued to tour extensively in over 20 countries, building a firm following and respect amongst media and the musician community, despite the lack of commercial marketing by Universal Records.
On 20 April 2006, Teitur Lassen's management issued a statement that he had dropped Universal as his record label following months of legal problems and creative differences, and from then on his records would be released on Arlo and Betty Recordings, a new label, run by his manager, and named after his two vintage Gibson guitars.
In October 2007, Teitur Lassen started recording a new album, The Singer.
The album was produced by Teitur Lassen and recorded and engineered by his long-time live sound engineer Jonas Bloch Danielsen, with arranger collaborator Trondur Bogason.
Teitur Lassen recorded his next album, Let the Dog Drive Home, in early 2010 in Copenhagen, with some of his regular musicians and collaborators, arranger Trondur Bogason, drummer Derek Murphy, bass player Mikael Blak, and Nikolaj Torp Larsen, and a host of guest musicians, and backing singers.
Teitur Lassen produced the album, which was recorded and engineered by his regular cohort Jonas Bloch Danielsen and mixed by George Tandero who recorded and mixed Stay Under the Stars.
In 2013, Teitur Lassen released his fifth studio album in English.
The album written, produced and arranged by Teitur Lassen is the first one recorded on the Faroe Islands, and it features 78 local musicians from the age of 7 to 83.
In 2018, Teitur Lassen released his album I Want To Be Kind, recorded and mixed in Reservoir Studios in New York, USA.
Teitur Lassen sang all the vocals and Teitur Lassen and Thomas played most of the instruments on the album, with some additional bass clarinet by Doug Wieselman.
In 2008 Teitur Lassen collaborated with composer Nico Muhly for the piece Confessions for the Holland Baroque Society.
Teitur Lassen produced and arranged the album "Le Cheshire Cat et Moi" in 2009 for French superstar Nolwenn Leroy, in addition to co-writing five of the songs.
In 2011, Teitur Lassen wrote a seven-piece song cycle for choir and orchestra called "Weekdays", which was performed in late 2011 by the Danish National Symphony Orchestra and the DR Girls choir in Copenhagen.
In 2012, Teitur Lassen performed live across the Netherlands with the Netherlands Wind Ensemble, while a film was shown which he commissioned and composed the score to, directed by Thomas Koba, under the title "Everyday Song", with additional music composed for the live show by Trondur Bogason.
The 30-minute piece was premiered in Holstebro with 100 young choristers in celebration of the 75th birthday of the Holstebro Gymnasium og HF, where Teitur Lassen was a student.
In 2015, Teitur Lassen wrote "Romeo Answers " for Messer Quartet.
In 2017, eight of Teitur Lassen's songs were integrated in the hymnal of Church of Denmark, Kirkesangbogen.
Teitur Lassen was the co-writer of nine songs and co-produced and arranged the album as well as playing guitar, piano and synths.
In 2019, Teitur Lassen appeared in the Danish TV series Toppen af Poppen, performing songs by six other well known artists, who performed songs originally recorded by Teitur Lassen.
In 2020, Teitur Lassen released a four track EP, Modern Era, with visuals based on photos by Simon Harsent.
Teitur Lassen is close friends with the singer Judith Holofernes of Wir Sind Helden.