VIDEO: Gabriella's Mom Tests Her Daughter With Cookies

On next week's series premiere of "I Used To Be Fat," we'll meet Gabriella, a beautiful young teenager that's trying to take control of her life through fitness and dieting. During a heartfelt meeting with her mother and trainer, Gabriella brings up her mother's maybe-not-helpful weight-loss strategies, which include purposefully leaving out cookies and snacks as a test.

Check out the sneak peek below, where Gabriella explains to her mom that she's weak when it comes to food and that she really needs her on board if she's going to fix her eating habits. Plus, after the jump, check out four other sneak peeks of the premiere episode, which airs Dec. 29 at 10/9c.

VMAs 2017