incidentally, the expression "numa, numa" is commonly used in Romanian folk music and dance (but Dan did not mean this kind of "numa, numa": in his song, there were really two separate words "nu" and "ma" -- which should have a symbol on top)
P.S. Authentic Romanian folk dance can be very demanding but O-zone just picked some "easy steps" for their clip and you could still tell they were no dancers... (they were mostly having fun...). However, Arsenie did have the potential to dance well -- would have been hard to guess by watching him in the O-zone videos -- and proved it during his participation in the Romanian equivalent to "Dancind with the Stars." D.