Full makeover

Well, if you're going to use your mind control powers, the least you can do is make her happy. Since she doesn't like her physical appearance, perhaps you can use your mind control powers to put her in a position where she does.

"Amy, you know that there is a gorgeous woman inside you. And we are going to let her out. Do you understand?"

"Yes..."

"We're going to take you to get a makeover. We're going to get you some pretty clothes, get you made up, and we're going to take you to a gym to get you in shape. Do you understand?"

"Yes..."

"Good. Come with me, Amy."

"Yes..."

Simple, right? You get new powers, and you use them for good.