There are at least 2 artists using this name
1) IndiePop trio from Minneapolis, MN.
2) a deathcore/metalcore/metal band from Tampere, Finland, featurin members from Medeia and Pofony

1) Briana Smith (guitar, Keys, vocals) and Jessica Seamans (bass, recorder, vocals), the core members, grew up in the Brainerd Lakes area in a town called Crosby, and are real-life best friends. At first "two brainy, nerdy outcasts who eventually developed a fierce mutual devotion, although when they first met in 5th grade they made a lousy impression on each other, but not for long.

Read more about Best Friends Forever on Last.fm.