Butt Exercises
For a bigger butt you need to work out very specific butt muscles. The best exercises are hip lift and step up.
Also, you can have the strongest glutes in the world, but if they're hidden under a layer of fat (and cellulite), nobody will see them. So you need to get rid of fat too (which takes care of cellulite as well). Look for specific butt workouts, i.e. http://www.firmbuttexercises.com/workout ... and others.
