Have you any clue how many frum songs are taken and copied EXACTLY from non Jewish songs? I think for sure it is not lashon hora to repeat ones that are public knowledge to be copied. Many people think that the most high profile (besides Lippa and Country Yossi) is MBD’s Yiddin but I think the most high profile is Breslov’s famous song ‘Rabbi Nachman, Nachman m’Uman…’
My dad told me that years ago he was at a wedding where the Spinka Rebbe was attending and the band struck up with ‘Those Were The Days’ and the Rebbe was tapping the table in time to the music.
Its a hard one, seforim say that the Shaar Hanegina is a very high madreiga and music must come from a pure source.