In reality, a couple of the VS Models have opened up about their diets before a show and it is encouraging extreme dieting and being past the point of a naturally slim woman with big boobs.
They are often skeletal, which is not 100% natural for a lot of them. Doesn't mean it's not natural for some women but for the majority of the models they have to work hard to fit into the narrow body type that VS has glorified for a long time. Plus implants and surgery etc.
It's a catchy simple tune to open up the eyes of young women and men.