It used to be that huge breast implants were the way to go to get attention in Hollywood, but now it seems that the focus of fashion has swung around to the rear (so to speak).
There are many non-surgical ways to improve the appearance of your butt. If you want to reduce and tighten, exercises like walking, jogging, and rollerblading (especially uphill) will make a huge difference. Weighted squats can help build round muscle if you have a small frame and wish you had more meat on your booty.
Would you resort to surgery if those methods didn't work?