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"&lt;strong&gt;&lt;img alt=\"0723_mariah_carey_article\" src=\"http://ll-media.tmz.com/2012/07/23/0723-mariah-carey-article-1.jpg\" /&gt;&lt;br /&gt;Mariah Carey&lt;/strong&gt; was a \"nightmare to work with\" during her brief stint as a guest mentor on \"&lt;strong&gt;American Idol&lt;/strong&gt;\" in 2008 -- this according to sources on the show.&lt;br /&gt;&lt;br /&gt;Sources tell TMZ, Mariah -- who made her mentor cameo on \"Idol\" Season 7 -- was incredibly late for her shoot at the Beverly Hills Hotel,\" not very nice at all,\" and ridiculously nitpicky about tiny details.&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;In contrast, the same sources agree&amp;#160; J.Lo was a pleasure -- \"night and day\" compared to Mariah. We're told J.Lo was all about business, in and out, no mess, no fuss.&lt;br /&gt;&lt;br /&gt;As we reported, Mariah has been tapped as the newest judge for \"Idol\" next season. She signed a deal worth roughly $18 million for her first year on the show."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.tmz.com/2012/07/23/mariah-carey-nightmare-american-idol-judge/5/>