Having a huge ribcage and being a girl?

I have the SAME EXACT problem. My ribcage is humungous. the smallest my waist can get is 24 in. and my ribcage is like 32 inches- not kidding. I'm afraid there's nothing we can do to tighten our ribcages. It's not a bad thing being barrel-chested though. It makes your waist look smaller lol. Learn to love it- that's my best advice ( I know I had to).