Never heard of Rangiku Matsumoto?
Then you're not watching the right anime.
Matsumoto is from an anime called bleach where she plays a lieutenant of the 10th division. She is a perfect example of the over use of giant boobs in anime but that shouldn't stop hot women dressing up like her.
In the link below there are numerous pictures of different women all dressed like Matsumoto and have the tits to match. While I admit some of them might be but-her faces it's not like we spend a lot of time looking there anyway. Am I right?
So enjoy the cosplay as it is, you will be much happier.
Cosplay Pictures: http://www.gofanboy.com/go-fan-babes/cosplay-babes/4045-rangiku-matsumoto-of-bleach-is-the-cosplay-babe-of-the-week/