Girlfriends Films has announced the DVD release of Cheer Squad Sleepovers 21. Featuring cover models Blair Williams, Veruca James, Violet Starr, and double-featured Summer Day, the film is now available on the Girlfriends Films Distribution website and in stores nationwide.   Directed by Girlfriends Films founder Dan O’Connell, Cheer Squad Sleepovers 21 is a two-part feature detailing the exploits of…