That is not much weight to lose (says me because I deal with food addicts who usually have suffered with a lot of weight over a long period of time), so it really depends on how fast you want to lose it.
You could try a detox or a fast (by fast I mean having freshly squeezed juices only for a few days). This route may give you unpleasant but temporary symptoms but is healthy for the body and works fast.
Otherwise, a diet per se is not really necessary. Just cut out the junk, exercise, and perhaps swop one meal a day for fruit.
You don't need a diet. Besides, its been shown that only 5% of all dieters actually lose their weight and keep it off, so rather just make a few changes.