Gabriele Susanne Kerner, better known by her stage name Nena, is a German singer who rose to international fame in 1983 as the lead vocalist of the band Nena with the Neue Deutsche Welle song "99 Luftballons". From Wikipedia
The pop icon’s sold-out shows in Hamburg featured an almost accent-free rendition of the German classic, dazzling fans with high-energy performances and personal interactions.