Does anyone know which japanese pop group sang the Fushigi Yuugi - Dreams come true song?

Also if anyone ever watched the americanised version (dubbed) of cardcaptor sakura, which japanese pop group sang the dance track for the series after sakura captures all the cards? Notes go F, C#,F#,A#,F, D#, top C#,D# (back to bottom again) , top C, G# if it helps. I'll put it the opening in midi if it helps? word's that I remember were "La la la la la laaaa. Oooh, la la la la laaaa." at the opening. Also does anyone have this song? I know its japanese, NOT english!

thanks

~an-kun~