Slumber Party Girls

The Slumber Party Girls (also known as SPG) are an all-girl   American   pop  band from series. They are based on the orginal SPG girls from 2006-2007.

Formation
The Slumber Party Girls was formed in an fanfiction versions of SPG. The five girls Cassie McKnight, Caroline Jones, Lina Carlyle, Mallory Lopez, and Karla DiAngelo were friends from San Bernardino who formed SPG based on music and slumber parties.