1-4-2010 forever 21 song

does anybody know this song i heard at forever 21 on january 4, 2010..
i dont know much of the song but that its a female singer, kinda pop/techno and the chorus kinda goes like this..
"i know i know ( i know i know)"

would greatlyyyyy be appreciated..

i believe the song youre looking for is "mini viva - left my heart in tokyo", i was working and had to find this song, i was searching forever!!!