Ok so I just got engaged on June 29th. I will be having a short engagement. The wedding date is set for 11/11/11. I'm 27 yrs old, 5'2 and weigh about 140 pounds. i don't feel overweight but I would like to slim down and tone up for my wedding just to look extra nice!

In my dream world I would like to lose 20 pounds but what can a realistic weight lose goal be for 4 months? Im a graphice designer so my job is very stationary and don't get much movement while at work. Any tips...advice would be greatly appreciated. Thanks!