Oooh! I have a list of places I shop in my website's sidebar! But I'll rehash what I've got. And I'm so late answering this, lol.

I usually buy my clothes online from Alloy. Their sales make my face pleased. If I go to a physical store, it's usually Old Navy. If not Old Navy, then I'll try and peruse Lane Bryant's clearance. There's not much of a selection as far as physical stores are concerned when you're fat, so I really usually just stick to online shopping. And I'd like to wear better clothes so maybe this time next year, these answers will be different.