Three weeks ago, we learned that Ringo Starr is the world's richest drummer. Today, the same website lists Starr's former bandmate in the Beatles, Sir Paul McCartney, as the most valuable lead singer (and presumably, bass player) in the world.

Celebrity Net Worth estimates McCartney's net worth at $800 million, presumably in part due to his vast publishing holdings. They arrived at the figure based on "all publicly available information including salaries, real estate holdings, divorces, record sales, royalties and endorsements. The final net worths come from a formula that takes out taxes, manager’s fees, agents’ fees, and lifestyle."

Directly below McCartney, but far behind in terms of dollars, is Bono at "only" $600 million. It was suggested that the U2 singer had become a billionaire through his equity firm's stake in Facebook, but he quickly denied this story.

For the record, Starr's $300 million would have been good enough for sixth place, between Mick Jagger ($305 million) and Sting ($290 million), but he did not make the list. Apparently 'Octopus' Garden,' 'Photograph' and countless All-Starr Band tours aren't enough to consider him a frontman.

The rest of the Top Ten contains pretty much the names you would expect, such as Elton John, Jimmy Buffett and Prince -- songwriters with large, hit-filled catalogs that can still command top dollar in concert.

Top Ten Richest Lead Singers (in millions of dollars)

1. Paul McCartney: $800
2. Bono: $600
3. Jimmy Buffett: $400
4. Elton John: $320
5. Mick Jagger: $305
6. Sting: $290
7. Phil Collins: $250
8. Dave Matthews: $250
9. Prince: $250
10. Dave Grohl: $225