There are seven bands with the same name:
1. Japanese J-Pop group "Sphere"
2. Norwegian Modern Metal band "Sphere"
3. Polish Death Metal band "Sphere"
4. An American Jazz Quartet "Sphere"
5. Czech Metalcore band "Sphere"
6. A female trip-hop singer
7. A Japanese shoegaze band 1. Sphere (スフィア) is a Japanese pop idol unit formed by four voice actresses affiliated with Music Ray'n. The group made their major debut in April 2009 under Lantis with the single "Future Stream" which was used as the opening theme for the anime Hatsukoi Limited.

Read more about Sphere on Last.fm.