Biography
Love Planet Five ~I've special unit~ are 5 of some of I've Sound's most famous singers:
KOTOKO, MeLL, 川田まみ, 島宮えい子, and 詩月カオリ.
Read full biography ↓
They come under the genre of j-pop or Japanese Pop.
They have recently released their first single, Tenjou wo Kakeru Monotachi, the Theme Song to Shakugan no Shana the Movie.
References:
Artist Official Site
Shakugan no Shana Movie Official Site
Biography text from Last.fm, available under CC BY-SA.