How do i turn a pear shaped body to an hourglass?

For the past 2 years I've had problems accepting my body type. I've always wanted to resemble an hourglassy figure, like Nicki Minaj, but people usually tell me I'm a pear shape like J-Lo, which I hate, because I personally think pear shaped bodies are ugly. What should I do to increase my bust size? My measurements are 36-29-42.