Billboard's list of the highest-paid musicians arrived in March, and it's no shocker that seven-time Grammy winner Taylor Swift is sitting pretty. She comes in at No. 1 with $39,699,575.60 for 2013. According to Billboard, it forms the list by ranking the artist's U.S. earnings, which are calculated from touring, recorded-music sales, publishing royalties and revenue from digital music and video streaming. Here are the rest of the Top 10.