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Simon Cowell, former judge of 'American Idol,' earned $90 million between May 2010 and May 2011, according to Forbes' list.
Cowell left the FOX show in the spring of 2010. The British television personality also co-produces other talent reality show 'America's Got Talent' and served as a judge on the the UK programs 'The X Factor' and 'Britain's Got Talent.'
His new singing contest series, the U.S. version of 'The X Factor,' is set to debut on FOX on Sept. 21, 2011 and also features former 'American Idol' judge Paula Abdul.
(Pictured: Simon Cowell appears in a promo for 'The X Factor,' which debuts on FOX on Sept. 21, 2011.)