do a lot of hip rotation exercises, sit ups, bicycle sit ups, running helps, anything that basically helps move or rotate your waist area-I do a lot of those in the gym. it really does help with giving more curves.
You can workout by lifting weights and cardio exercises that will tone ur body and give you some thickness although you won't have results right away. You can also look for clothes to accentuate ur body and show curves that you may not have noticed you had. Pieces such as belts and cinches are gr8 for makin you look curvy