WHO IS THIS STAR?

GUESS WHO IT IS (leave a comment)...

He is a singer and he is very famous!
He was born in Leipzig on September 1st 1989.
So, he is 18 years old. He has a twin brother.
When he was a child he lived in Magdebourg.
Today he lives in Hambourg.
He is German.

Who is he ?!


(sent by Julie)