Yeah- agree with the above, it doesn't matter what you eat where weight loss is concerned. Certain things are easier to eat whilst trying to lose weight and you may well find your eating more and more and more of the junk food week to week (at first its a novetly, then it becomes something you need more of to get the same satistfaction...and bang, your eating more calories then you use and your weight goes up).
Keep a log of exactly how many calories your eating if you chose to eat junk as it can very easily go up. Also remember to give your cardio a boost every 6-8 weeks to ensure your burning enough calories to compensate, at first your body gets a shock from the exercise, you lose weight, then your body gets used to the form of exercise you chose, it learns to be clever and retain a few calories so its no longer in deficit and then it manages to send you strong cravings for high calorie high fat/sugar type foods which then add to your waistline.
Its alot harder to say "no" when these foods are already in your kitchen/n your shopping list/in your short term memory. Its also alot harder when your body is depleted of the correct nutrients it needs: you need 1.5-2g of protein a day, not just monday to fridays, you need vitamins and minerals every single day, not just monday to friday and you need to be careful as you can get very mixed cravings when your down a whole load of these macros and vitamins and nutrients, hence you can end up eating more junk to compensate.
As long as your in a calorie deficit you will lose weight, just be careful to make sure you are still within that calorie deficit.