How much weight would I have to lose for my thighs to stop touching?

I'm 16, 5'5", and somewhere between 130 and 138lbs, a size 6. According to my doc I have a large bone frame. When I stand straight with my feet together my thighs touch for an inch or two near the top. If I stand with my feet two inches apart they don't touch at all. How much weight would I have to lose for them to stop touching? I'd kinda like that before I go to Cancun on the 13th. I eat 500-1000 Calories a day and I've already lost like 85lbs. My thighs have touched as long as I can remember.