Well. .you can't spot reduce.
But really what will do the trick is some cardio and nutrition. walking for an hour or running for a half our or riding the bike, swimming etc etc etc as long as you get cardio as often as you can hopefully 5 days or more a week at least 30 minutes hopefully 45
and then the diet, just dont eat stuff with fat unless they are healthy fats. drink skim milk avoid cheese and mayonaise. avoid fried foods and stuff like that. I mean once in a while is allright but the more you cut back on those things the faster youll get there
use this
http://www.freedieting.com/tools/calorie_calculator.htm
and follow it to a tee and count every last calorie you take in for the day, just try and keep a running total in your head or something you can just round stuff off.