There are hairstyles that just scream "extensions" and this one on Petra Ecclestone is one of them. While this style is absolutely gorgeous, it just looks too perfect, shiny and synthetic.
These gals enjoy their individuality and it shows in their hairstyles. Sharing only sine and length, Petra and Tamara Ecclestone has deep waves on one style, while the other has tight coils of curl on the ends.
Handling wet hair will make it frizz in a flash so it's best to implement waves on dry hair. Petra Ecclestone has long, all-one-length hair that will weigh down a style, however, you can still get a little bit of wave like she has by rolling up completely dry hair, pinning it, apply heat from a dryer, completely cool (preferably with the cool setting on that dryer), take down and watch the magic unfold.