Udo Jürgens ( born Udo Jürgen Bockelmann ; 30 September 1934 -- 21 December 2014 ) was an Austrian-Swiss composer and singer of popular music whose career spanned over fifty years .
Udo Jürgens ( born Udo Jürgen Bockelmann , 30 September 1934 -- 21 December 2014 ) was an Austrian composer and singer of popular music whose career spans over fifty years .