What korean song is this??

there are some korean boys at my school dancing to this song called "Tell me" .. idk who the artist is or nething

it just goes
Tell me tell me ah ah aa ah ah ae mi..something like that
korean lyrics ... sounds gud , n really addictive, anyone know who the song is ?it starts with these2 -3 electronic sounds...damn cool..10 p and my gratitude to ANYONE who can help me!

wonder girls - tell me