I'm trying to lose weight & im worried ill lose my boobs & butt when i do. those regions have stayed the same since ive gained weight & were the same when i was the weight i want to be now. how good of a chance is it that they stay the same?

Likely stay same: Sometimes when people gain or lose weight,their breasts and/or buttocks can get larger or smaller with that change in weight.However, if you have already experienced weight gain and loss without that happening,it is less likely to happen now,as long as you are doing this in a healthy manner.Incorporate healthy eating and exercise,including both strength training and cardio and you should do well.