Aldious, an all female speed metal band, released their debut album last month. This is sure to become a popular band with the anime fans. It is real solid and good music, and you know so many will gush over pretty girls making up a metal band (and they are pretty, look at the pictures!). Check them out. :)
It should be on iTunes Japan, but I dunno about other territories. It isn't on iTunes U.S.
To check them out:
Spoiler for Clicky: