Studio musician:
1999 Freedom Call - backing vocals  
2001 Freedom Call - backing vocals  
2001-2003 Grave Digger - backing vocals  
2002 Genius: A Rock Opera - choir  
2005 Helloween - backing vocals  
2006 Saxon - backing vocals  
2012-2013 Helloween - backing vocals  
Guest musician:
2001 Blind Guardian - backing vocals  
2005-2006 HammerFall - backing vocals  
2006 Blind Guardian - backing vocals  
2009 UFO - backing vocals  
2010-2015 Blind Guardian - choir vocals