First and foremost:
the benefits of weight training for fat loss far outweigh those of cardio
Lifting weights is the most efficient way to quickly gain the lean physique you are after.
Lifting weighs sets your body up for metabolic reactions that allow you to utilize nutrients better (like ice-cream), and continue burning calories for up to 36 hours after your workout.
Basal Metabolic Rate (BMR). BMR controls how many calories your body burns while you rest. As you gain more muscle, your BMR increases, as does how much you can eat and still stay lean. As you develop more lean muscle, you will store less body fat!
The gluteus maximus is one of the strongest muscles in your body. You can shape this muscle with muscular development. The best way to encourage this muscular development a deep, heavy squat. Squats will help tone the glutes, reduce cellulite in your legs, and strengthen your lower back.