These girls are amazing. They REALLY can sing and even dance. They are talented. I recommended that you give them a listen. They are not your usual Japanese pop female group. They kinda remind me of Tenjochiki. You might have never heard of them. But that's because they didn't get enough promotions. Don't make that a reason for you not to listen to them.
Anyway, I decided to share all their albums and singles just like I said I will before.
Profile

BRIGHT is a dance vocal band in Japan. A chorus group, Ko Spellers
(子スペラーズ, Ko Spellers) was formed in 2001, then it was renamed under the current name in 2003, after NANAKA joined the band. On April 25, 2007, the band indie debuted from Rhythm Republic. On January 16, 2008, the band major debuted from Rhythm Zone.
Members
NAGI (重村渚, born August 2, 1990 in Hyogo Prefecture) - leader; plays alto.
MI-MI (井上みづき, born September 28, 1990 in Osaka Prefecture) - plays mezzo-soprano.
MEG (中谷萌美, born March 6, 1991 in Osaka Prefecture) - plays soprano.
NANAKA (小林菜々香, born May 30, 1992 in Osaka Prefecture) - plays mezzo-soprano.
LinksOfficial website