German singer best known as the lead vocalist for the power metal band Helloween. He has also contriubted to side projects like Avantasia,
At 17 years old, he sang for the band Ill Prophecy, who recorded an unreleased demo.
He was named the 18th all-time best singer in rock and metal in a 2013 Metal Hammer readers poll.
He has a younger sister and an older brother.
He and Andi Deris have both been vocalists for Helloween at various points in time.