Looking for croatian "choral" disco song!

[Mooo]

Hello! Almost year ago i've heard a fantastic song in one croatian disco..

Sadly only thing i remember that the song was sang by many people - choral song (how else to call it?)

PLEASE that song just contains part of my life I'd be very grateful if you AT LAST give me some tips what should it be.

[Mooo]

Refresh! Don't you guys have any tips, at least? Please.

[Mooo]

Dump :/