Hey,
I heard this song at Knossos FM last Friday, early in the morning (between 5 am and 6 am). It's sung by a female and repeats the word "s'agapo" in the chorus. The way she sings it goes like "ooooooohhhoooohooo" and the song sounds pretty current / new-ish. I only heard it once while staying in Crete, so I don't think it's THAT popular in Greece right now. The voice could be a mix of Vissi/Vandi but younger, e.g. a bit "thinner".
I know, this isn't much but please, please, please help me out! Thanks a lot!!!