The Girl's Alliance is one of the many alliances of Totally Teen Island. It was formed during the merge.
- Chrissy - Chrissy created the alliance in Catch The Piranhas!.
- Kai - Kai joined in Catch The Piranhas!. She was betrayed by Chrissy in Double The Trouble.
- Madi - Madi joined in Catch The Piranhas!.
- Lady Marmalade - Lady Marmalade joined in Catch The Piranhas!. She was betrayed by the alliance in Find His Theme!.
- Jessie - Jessie came up with the idea of forming an alliance in Dig Determination Out of the Ground. Forms and switches to new alliance in When Plans Back "Fire".
- Tobi - Tobi joined in Dig Determination Out of the Ground. Quits alliance in When Plans Back "Fire".
- Lady Marmalade - Marmalade joined in Dig Determination Out of the Ground. Quits alliances in When Plans Back "Fire".
In Catch The Piranhas!, the alliance was formed with Kai, Madi, and Chrissy. They formed it because they wanted to take down the boys. Sometime during the episode Lady Marmalade joined the alliance after she debuted. During the vote, Chrissy, Lady Marmalade, and Kai voted for Waluigi. Madi was the only member to not vote with the alliance.
In Find His Theme!, the alliance betrayed Lady Marmalade and voted her off.
In Double The Trouble, Crissy betrayed the alliance by voting off Kai and Madi. After Kai went home the alliance probably disformed due to Chrissy betraying Madi.
In Dig Determination Out of the Ground, Jessie, Tobi, and Lady Marmalade form a girl's alliance.
In When Plans Back "Fire, Tobi and Lady Marmalade quit and Jessie forms a new alliance.
- Lady Marmalade is the only contestant to be in the alliance for two seasons.