For 2 months I seriously tried my hardest to lose weight..sometimes i only ate 2 things a day. and for doing this for 2 months I only lost about 15 pounds :\..Thought i'd lose more. But u said u wanted to lose 50-60 lbs in 3 to four months, and i think you COUlD do it but its going to be tuff. Lose all that weight in short amount of time. Anyway i just think it'll take a lil longer then that to lose 50-60 pounds. Remember eat healther and exsercise! Good Luck!