I'm gonna go with blueberry cheesecake as of now. I also like Oreos w/ milk. Ben & Jerry's Marsha Marsha Marshmallow is pretty damn good too. Same with Dave Mathew's Magic Brownies. And Strawberry Kiwi Swirl sorbet is some fuckin good stuff too.
*Note: burgers and pizza are not considered junk food.
Oh I almost forgot chocolate cake /ice cream.