Forbes' World's Highest-Paid Musicians 2012: Dr. Dre, Britney Spears, Justin Bieber, Taylor Swift Make the List

Forbes has revealed 2012's highest paid musicians and Dr. Dre, Britney Spears, Taylor Swift and Justin Bieber are all a part of the list.

Between May 2011 and May 2012, Forbes estimated that Dr. Dre made $110 million in earnings before tax.

"Dr. Dre is this year's top-earning musician-thanks largely to his Beats headphone line," Forbes reported. "He leads a pack of pop stars, rock icons, rap moguls and country crooners, many of whom bank the bulk of their bucks outside the recording studio."

At No. 7, Britney Spears comes in making an estimated $58 million from millions from endorsements, a fragrance line with Elizabeth Arden and a platinum certified album in the U.S.

Taylor Swift made $57 million last year and Forbes reported that she made over "$1 million per night on the road this year, and also earns big as one of the faces of CoverGirl."

Justin Beiber rounded out the top 10 raking in an estimated $55 million.

"The 18-year-old is the youngest name on our list, thanks to sales of music and merchandise-and, more recently, stakes in startups including Tinychat, Stamped and Spotify," Forbes reported.

Other musicians who made the list include Rihanna ($53 million), Lady Gaga ($52 million) Katy Perry ($45 million) and Beyoncé and Jay Z (a combined $78 million).