Member:
1972-1995 Magnum - vocals  
2001- Magnum - vocals  
Live musician:
2008 Avantasia - vocals  
2010 Avantasia - vocals  
2011 Avantasia - vocals  
2013- Avantasia - vocals  
Guest musician:
2002 Avantasia - vocals  
2007 Ayreon - vocals  
2008 Avantasia - vocals  
2010 Avantasia - vocals  
2012-2013 Avantasia - vocals