Adam Lambert is a top earning Idol

As if we needed further proof, Adam Lambert is easily one of the most successful American Idol contestants.

According to the Forbes blog, Adam and Chris Daughtry are the (joint) second highest paid former contestants – both earning $6 million.

Topping the list is Carrie Underwood, who earned a whopping $20 million in the past year.

The site reports that, “These numbers are based on estimated pretax income earned from May 2010 to May 2011, before subtracting agent and manager fees. The totals were compiled with the help of data from Pollstar, RIAA and others, as well as interviews with industry insiders including managers, concert promoters, publicists, agents and, in some cases, the musicians themselves.”

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