Is there ANY way to make my ribcage smaller?

i would be pretty skinny if it werent for my ribcage. i got a mixture of large bones (moms side) with a small waist (dads side) and it looks freaky! im always getting made fun of for it when im in a bathing suit and when i wear tight shirts. but when i wear clothes i look fatter than i am because the top of me is bigger because of my ribs and i hate it!! i heard that wearing a corset is supposed to, over time, make your ribs smaller. any info on whether or not this is true? any other suggestions?? im so desperate here :( :(