Carrie Underwood returned to "American Idol" last night, singing a George Michael chestnut, "Praying for Time," during the "Idol Gives Back" special.

Since Carrie's been on that same stage in front of the same judges, she's quite familiar with the pressures of singing in front of Randy Jackson, Paula Abdul and — especially — Simon Cowell. And she's stunned at some of this year's contestants, who've actually questioned Simon's assessments from the stage.

"His role, I guess, is to be the bad guy, so I get so, so angry when I see contestants up there arguing with him," Carrie told Fox News. "Just take it. Get up there, and take it like a man."

Carrie certainly speaks from a place of success. Not only is she the only "Idol" alum to have sold 7 million copies of a single album, she's currently at No. 1 and No. 2 on the GAC Top 20 Country Countdown, she has two albums in the Top 10 of the Billboard Country Albums chart, and she has two songs in the Top 20 among the magazine's top country singles.