I Feel You" (with Peter Heppner)* 2004 - "I've Seen It All" (with Maya Saban) (1 Track Promo Release Only)* 2004 - "The Smile" (with Sarah Brightman) (1 Track Promo Release Only)* 2005 - "Die Nacht... Du Bist Nicht Allein" (with Thomas D.) (The Night... You Are Not Alone)* 2006 - "Der Tag... Du Bist Erwacht" (with Jette von Roth) (The Day... You Are Awake)* 2008 - "Sehnsucht" (with Xavier Naidoo) (Desire) (1 Track Promo Release Only)* 2008 - "Let Me Love You" (with Kim Sanders)* 2008 - "Time For Dreams" (with Lang Lang)* 2008 - "You" (with Colbie Caillat)* 2010 - "Try" (with Nadia Ali)* 2010 - "I Will Follow You" (with Hen Ree) (Release: 11 June)* 2010 - "Always You / Innocent Lies" (with Anggun) (Release: 12 November)* 2012 - "Sonne" (with Unheilig) (Release: 21 September) (Sun)==== USA releases ====* 2000 - "Das Glockenspiel / The Bell"* 2002 - "Dream of You" (with Peter Heppner)* 2005 - "I Feel You" (with Peter Heppner & Kristian Djunited Hansson)* 2007 - "Tired of Being Alone" (with Tarja Turunen)* 2008 - "Porque Te Vas" (with Ana Torroja)* 2008 - "Forever" (with Kim Sanders)* 2008 - "Breathe" (with September (singer))* 2008 - "You" (with Colbie Caillat)* 2011 - "I feel You" (with Kristian Djunited Hansson and Nadia Ali==== UK releases ====* 2000 - "Das Glockenspiel" #79* 2001 - "Ruhe" #126* 2001 - "Das Glockenspiel (DJ Tiesto remix)" #17=== Video ======= German releases ====* 2001 - "Weltreise – Die DVD"* 2004 - "Leben – Die DVD"* 2004 - "Live Erleben" (live DVD)* 2006 - "Tagtraum" (double DVD + audio CD)* 2008 - "Sehnsucht Live" (double DVD)* 2010 - "Lichtblick" (double DVD)* 2013 - "Sonne Live" (double DVD)* 2014 - "Symphonia"==== USA releases ====* 2002 - "Voyage – The DVD"* 2004 - "Life" (special editions of the album contained an amended, translated version of the DVD "Leben").
==== Немецкие релизы ====* 1999 "Zeitgeist" (Дух времени)* 2001 "Weltreise" (Путешествие по миру)* 2002 "Voyage"(Странствие)* 2003 "Leben" (Жизнь)* 2005 "Tag Und Nacht" (День и Ночь)* 2008 "Sehnsucht" (Тоска)* 2010 "Atemlos" (Бездыханный)* 2010 "Lichtblick" (Солнечный зайчик)* 2012 "Sonne" (Солнце)* 2013 Opus (30.08.2013)* 2001 "Zeitgeist" (Spirit of the Time)* 2002 "Voyage"& DVD* 2004 "Life"* (Collectors edition includes amended, translated version of "Leben" DVD)* 2007 "Day and Night"* 2008 "Desire 2.0"* 2010 "Breathless"==== Немецкие релизы ====* 1998 "Das Glockenspiel" (Перезвон)* 1999 "Liebesschmerz" (Муки любви)* 1999 "Ruhe" (Тишина)* 2000 "Ein schöner Tag" (Прекрасный день) (with Isgaard)* 2001 "Dream of You" (with Peter Heppner)* 2001 "Dancing With Loneliness" (with Kim Sanders)* 2003 "Liebe" (Любовь) (with Mila Mar)* 2004 "Leben... " (Жить...) (with Peter Heppner)* 2005 "Die Nacht... Du bist nicht allein" (Ночь... Ты не один) (with Thomas D.)* 2006 "Der Tag... Du bist erwacht" (День... Tы проснулся) (with Jette von Roth)* 2008 "Sehnsucht" (Тоска) (with Xavier Naidoo)* 2008 "Let Me Love You" (with Kim Sanders)* 2008 "Time For Dreams" (with Lang Lang)* 2008 "You" (with Colbie Caillat)* 2000 "Das Glockenspiel/ The Bell"* 2002 "Dream of You"* 2005 "I Feel You"* 2010 "Innocent Lies"* 2010 "Always You"* 2010 "Try (Mit Nadia Ali)"* 2010 "I Will Follow You (Mit Hen Ree)"==== Немецкие релизы ====* 2001 "Weltreise - Die DVD"* 2004 "Leben - Die DVD"* 2004 "Live ErLeben" (live DVD)* 2006 "Tagtraum" (double DVD + audio CD)* 2008 "Sehnsucht Live" (double DVD)* 2010 "Atemlos + Limited Ultra Deluxe Edition" (Die DVD)* Atemlos Live (2010) Blu-ray 1080p AVC DTS-HD 5.1* SONNE LIVE (BD, 2013)* Symphonia LIVE (BD, 2014)* 2002 "Voyage - The DVD"* 2004 "Life" Special editions of the album contained an amended, translated version of the DVD "Leben".