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American professional boxer Floyd Mayweather, Jr. has an estimated net worth of $565 million. Perhaps the best boxer of this era and without question the most talented, Floyd “Money” Mayweather has shown an unprecedented mix of speed, power, and natural instincts every time he steps into the ring—a combination that has already translated to six boxing championships in five different weight classes: Super Featherweight, Lightweight, Junior Welterweight, Welterweight twice and Super Welterweight. His professional boxing record is an astonishing 50 wins (27 knockouts) and 0 loss, with the win against mixed martial artist Conor McGregor of the UFC. In 2012 and 2013, he topped the 50 highest paid athletes lists of Forbes and Sports Illustrated. In 2014, he was listed again by Forbes as the world’s highest-paid athlete.

London-based Chartered surveyor David Lewis, sold a number of businesses at the top of the market, including Hampton Trust, which netted him £25m for his stake. The Sunday Times Rich List saw £43m of net assets in his current operations, but this year takes account of his huge art collection, quietly amassed and now worth up to £300m. David Lewis now has an estimated net worth of $570 million.

Australian businessman, Gordon Merchant, has a net worth of $570 million.

Australian mining magnate, Travers Duncan, has an estimated net worth of $570 million.

American singer, songwriter, actress and entrepreneur, Madonna has an estimated net worth of $580 million. Born Madonna Louise Ciccone on August 16, 1958 in Bay City, Michigan, she was confirmed in the Catholic Church and adopted Veronica as a confirmation name.

British entrepreneur, artist manager, television producer and creator of the Idol franchise, Simon Fuller has a net worth of £375 million ($580m) as of April 2012, according to the Sunday Times Rich List. Fuller’s London company XIX Entertainment has been valued at £100m. The 51-year-old former talent scout, who devised the successful US talent show American Idol, now in its 11th season and topping the ratings, he set up XIX after leaving the CKX entertainment group in 2010. He still works with CKX as an adviser on American Idol, earning a £10m bonus for its continued success. He has also guided the careers of David and Victoria Beckham, and manages tennis star Andy Murray and Formula One driver Lewis Hamilton. His personal assets include 13 properties worldwide.

American radio talk show host and political commentator Rush Limbaugh has an estimated net worth of $590 million.  Rush Limbaugh is the outspoken, ultra-conservative and ultra-popular host of The Rush Limbaugh Show, an A.M. radio show about American politics.

Narotam Stayanarayan Sekhsaria is an Indian philanthropist and businessman who has an estimated net worth of $590 million. His family started in the business of trading cotton but he and his brother-in-law, Suresh Kumar Neotia, eventually entered the cement business and co-founded Gujarat Ambuja Cements in the year 1986. The company eventually became one of the biggest cement producers in India.

Nicknamed as the “Mob’s Accountant”, Meyer Lansky earned a great deal of notoriety for being one of the pillars of “National Crime Syndicate” in the US. He co-founded the organized crime group with Charles “Lucky” Luciano. From then on, he was considered as one of the most powerful figures in the US. As of 2012, Lansky’s net worth is estimated to be around $600 million.

For more than 25 years of his life, Marc Leder has been actively involved in business operations, leverage buyouts and banking investments. Together with Roger Krouse, Leder founded Sun Capital Partners Inc. But prior to that, he was hired by the Lehman Brothers as the firm’s senior Vice President.