There are several artists called Anna:
1) Anna Santos (Spanish/Japanese) of Latin band BON-BON BLANCO, who solos as "Anna"
2) German pop band (written "AnnA")
3) 90's Rock band from Croydon, England
4) Techno Project ("Schneewittchen EP")
5) Swiss rap artist (Debut: "Still Young", 2006, muve/Musikvertrieb)
6) Ukrainian nu-metal band. 1) Anna Santos is the vocalist of Latin band BON-BON BLANCO. She releases her solo work under just "Anna".

Read more about Anna on Last.fm.