About Kai Hansen
Kai Michael Hansen (born 17 January 1963) is a German musician who is the founder, lead guitarist and vocalist of power metal band Gamma Ray. He is also one of the co-founders of another power metal band Helloween, which he was a part of from 1983 to 1989 and rejoined in 2016. He is a prominent figure in power metal and has sold millions of albums worldwide. In 2011, he joined the band Unisonic featuring Helloween vocalist Michael Kiske. Hansen and Kiske reunited with Helloween in 2017 for a world tour with all current members, celebrating the 30-year anniversary of release of the albums Keeper of the Seven Keys Parts I and II. == Early life == Kai Hansen was born in Hamburg in 1963. At the age of ten, Kai developed an interest in music and began to play wash-drums. His parents however, didn't like the noise and bought him an acoustic guitar instead. He took a six-months course in classical guitar and following it, formed his first band with his classmates after he bought an electric guitar, a white Ibanez Les Paul. == Career == Hansen's musical career started in 1978 in a band called Gentry, alongside Iron Savior's co-founder and producer Piet Sielck. In 1983, he and Michael Weikath founded Helloween, where he was guitarist and singer until Michael Kiske took over the microphone for the albums Keeper of the Seven Keys: Part I and Keeper of the Seven Keys: Part II. Hansen left the band on 1 January 1989, citing exhaustion from touring, also frustrated that the band wouldn't reschedule dates in spite of his two-month hospitalization for hepatitis B, and then went on to form his own power metal band Gamma Ray.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.