Erin Breslin is Jack Douglass's wife replacing former girlfriend Kristen Klessig, which created epic controversy among the Bich Army. She made her first appearance in a jackisanerd video called "Hot Irish Female", and since then has continued to appear in more videos such as YGS 50, 70, and 100, YIAY 216 and 500 as well as every JackAsk ending in 6. She is also commonly known as 2toesup.
Erin also hosted YIAY #216, with Jack appearing at the end. She appears regularly on Jack's channel.