How to look less curvy?

Okay, I am 13 but I have more curves than my mom and my friends. I personally think curves are hideous and I hate their guts. Anyways, I don't want to wear baggy clothes because I'll look heftier. Is there any way I can hide my curves without bagginess. I tried longer sweaters and shirts to hide my hips but any other way? My bum is giant and so is my bust. My thighs are enormous and my waist is itty bitty. Plus it's all stinkin muscle so I'm stuck with it.