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The “widest margin in history between the first and second spots” in Forbes’ annual top-earning musicians list could be attributed to Dr. Dre (pictured) selling Beats to Apple this year. Reuters

Beyoncé made a tidy $115 million this year, but it was a far cry from rapper/producer Dr. Dre’s $620 million before taxes, according to Forbes’ annual list of the world’s highest-paid musicians. The “widest margin in history between the first and second spots” in Forbes’ top-earning musicians list can be attributed to Apple's buy of his company Beats.

The tech titan bought Beats, the audio electronics company Dre co-founded in 2008 with producer Jimmy Iovine, for $3 billion this year. In addition to Beyoncé’s surprise 31-track album and her Mrs. Carter Show world tour, she had lucrative endorsement deals with H&M and Pepsi, reports Forbes.

The Eagles ($100 million) came in third, thanks to their History of the Eagles tour, which netted them more than Lady Gaga, Kanye West and Miley Cyrus combined.

Bon Jovi ($82 million) and Bruce Springsteen ($81 million) were in the fourth and fifth top earner spots, respectively, and Justin Bieber ($80 million) beat out Taylor Swift ($64 million) and Lady Gaga ($33 million).