all I remember is the music video
The song is sung by a woman, with a German-sounding name.
The music video shows her and other women entering a hospital room and singing/dancing around the bed of an old man in striped pyjamas. The singer and dancers are all dressed in a very strange manner. At first he is annoyed by the noise. Then, he gets up and starts to dance with them. They dance until all the women disappear, while he is left stranded on the seaside. The end.
I can't remember the name of the song or the lyrics, but I think it's something to do with the past.