'Idol' Songs Ruffle Producers

'American Idol's' Katharine McPhee and Taylor Hicks' last minute song changes won the judges over -- but ticked off producers.

Sources tell TMZ that McPhee and Hicks' decision to pull the plug on their initial song of choice mid-week ended up costing a significant amount of money. The 'Idol' band and backup singers scrambled to learn the new compositions and the entire crew, especially lighting, spent costly hours making changes. We're told producers were very frustrated.

In addition, sources tell TMZ that 'Idol' producers were surprised by Chris Daughtry's song choice -- 'Innuendo.' They even went as far as telling Daughtry during Tuesday's dress rehearsals -- moments before the contestants took the stage live -- that they disliked the song and wouldn't have picked it if they were him. Simon certainly wasn't impressed.

Could the backstage bashing have affected Daughtry's performance?

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In addition, sources tell TMZ that 'Idol' producers were surprised by Chris Daughtry's song choice -- 'Innuendo.' They even went as far as telling Daughtry during Tuesday's dress rehearsals -- moments before the contestants took the stage live -- that they disliked the song and wouldn't have picked it if they were him. Simon certainly wasn't impressed.