Pop star Lady Gaga has been named the most powerful musician in the world by Forbes magazine, Yahoo Music reports.Forbes cites her mammoth $80 million dollar earnings in 2012 and 2013, alongside her massive social media presence (she was 38 million Twitter followers and 58 million Facebook fans). Gaga was also ranked #2 in Forbes' overall celebrity top 100, coming second only to Oprah.Forbes' top 10 most powerful musicians list is as follows:1. Lady Gaga
4. Taylor Swift
5. Bon Jovi
6. Justin Bieber
7. Jennifer Lopez
10. Katy PerryBut what do you think? Do album sales and social presence alone make an artist a powerful force. Who would you rank as the most powerful person in music and by what criteria? Let us know in the comments.