Any popularity of the song by Hashem melech on world charts is referring to the the non-Jewish versions from which Gad Elbaz copied it (C’est la vie by Khaled in Algerian Arabic and French or Vivir Mi Vida by Marc Anthony in Spanish). There are quite a number of Jewish songs that became hits in the Jewish world that are really tunes from the goyish world including some listed above (Moshiach by MBD). I don’t think the Jewish artists will try to hide this but they just figured most of their audience will not know or don’t care.
Joseph is right. Apparently the Alter is not very alter and is likely a young whippersnapper.