How can I become healthy etc ?

I want a body like alica keys, singer mya, and the rapper trina. I want my body to be nice and toned. i'm not a skinny girl. I'm what they consider to be thick and shapely. I also want beautiful skin, so pretty it glows (at times) without any makeup. I want nice nails and hair..... basically I just want a healthy lifestyle so I can look good and be healthy...... any suggestions, please?