"For a black girl" implies that indigenous features are not as inherently beautiful as those of other groups. Cut it out. 

Our Just Pretty Tee is perfect for anyone wanting to make a statement. It's made of 100% premium cotton, making it luxuriously soft and comfortable. Plus, it's unisex, so everyone can make a stand against the inappropriate phrase, "for a black girl." Black women are no less beautiful! Show your pride and make a statement with the Just Pretty Tee.