The Sirens(Equestria Girls)

After the Friendship Games at Canterlot High, the sirens are looking for their fourth siren sister and Fluttershy isn't ready but finds out that she is one of the sirens. After Fluttershy joins the sirens, they are in the Battle Of The Bands once again and the Rainbooms must get Fluttershy out of the Dazzlings group and realize that she is the element of kindness. Will the Rainbooms win the contest and save Fluttershy or will they lose and have Fluttershy be stuck as a siren forever? Read to find out!