Before I really go to bed I can say that on the old splash page it was written: テーマは『キ☆ラキラ』。 Exactly like that I remember. I took it to be related to music since it was in quotes and y'know, the word "theme", but... seems I was wrong in that. =x=;

The CD is most likely just another theme song single, with the theme song, karaoke version, and 3 other random pieces from the sound track.