10. Taylor Swift
Taylor Swift is showing her musical peers how to sell records and make serious money in the business. Let’s face it, the music industry is dying out, and musicians are barely able to get their fans buying a copy — but not Swift’s fans. Taylor, who proudly boasts of having a collection of albums which have all surpassed sales of 5 million copies, continues to outshine the likes of Ariana Grande and Rihanna. Taylor writes all of her own songs, her latest album 1989, sold 10 million copies worldwide, and she has one of the biggest-grossing tours every time she heads on the road. If she keeps this up, she’ll most definitely be a billionaire by 30.