If you count the calories correctly, yes, you will lose weight. Do some Googling; there is one guy who got most of his calories from Twinkies, another Snickers, another Big Macs and there are others that used other "junk" food. They were all proving the point that it doesn't matter as far as weight loss is concerned. Some ate other things or took supplements as a small part of the diet to get some vitamins and minerals and some didn't; they just ate better after the loss. You can mess up your relationship with food grouping things into good and bad. Just try to keep balance. A day here and a day there out of balance is okay. Depriving yourself completely of things you want often leads to a binge and/or abandoning the weight loss plan.