I was in a pub/club in Taiwan last week and I heard this amazing trance song played by the dj. I think the song is sung in Japanese but I am not quite sure. I downloaded almost every Ayumi_Hamasak songs but it doesn't sound like what I heard. Is there another Japanese singers beside Ayumi? I am also not quite sure if the song is in Japanese or not. If there any Taiwanese dj out there, might know I what song I am talking about, please help me. I know, by my description is not much help but any help would be greatly appreciated.

Again, the song is heard in Taiwan in a few clubs.
Possible it is in Japanese (not sure).
The crowd goes wild when this song is played.

Thanks again...