http://www.amazon.co.uk/Stin-Akri-Filiou-Margarita-Zorbala/dp/B000062W70Veinte Anos is on the album, "Stin-Akri-Filiou-Margarita-Zorbala", released in 2000.
As that fellow reviewed on the link, there's something very special about her voice. I'm not saying it is just good enough, or better than other singers.
I heard many different versions of "Veinte Anos", including a famous version by Omala from "Vuena Lavist Club", but her version just blows away all the others, her voice is both surreal and dynamic. Both "musical", and "Tight".
There are too many mediocore singers out there who are better known. What a shame, a truly gifted singer like her remains virtually unknown outside Greece and Russia.