Reading some of the posts here...
Myth #1: You can target areas for fat loss, like you can target areas to build muscle. Epic myth this one.
Sadly, they way it works, your body decides where to lose fat, and for men, the boep is the very last part, which is why you have to aim for a total body fat of 7-8% like xrapidx mentioned.
Myth #2: Light weight and high reps will build muscle mass
While not completely incorrect, also not 100% correct. You need to eat like a beast for one, train like a beast. Doing light weights many reps won't really build muscle. First, you need to build strength, via low reps heavy weight, and work that weight up to a very nice value. Then once you have done that, do high reps at 70% of the weight you did on heavy weight + low reps. Now this will help you build muscle, while you eat like a beast.
So conclusion, heavy weight + many reps (12-20) will build muscle mass, as long as you eat more than your body requires, then you will have muscle growth.