In the majority of cases on this list, we'll see that money has come to these young women through inheritance or rich relatives. It's incredibly hard to make more than a billion from a standing start, and so most people who possess that sort of wealth had a head start when it came to accumulating it. Caroline Jones is another example of that process in action.
Jones' father is Paul Tudor Jones - an investment specialist and hedge fund manager. Precious few people understand the intricacies of managing a hedge fund, but if you do, you'll never be short of work or money. Jones doesn't care for that world though. Her $3.4bn fortune bought her plenty of music and singing lessons, and she's making steady headway as a recording artist, having been blessed with the resources to release her own music without needing a record label.