As “American Idol” prepared to name the contestant who would round out this season’s top 24, Carrie Underwood got emotional. But the “Idol” judge’s emotions had more to do with the performance she had just heard than it did the pressure of the situation.

Superstar country singer Carrie Underwood is back on American Idol as a judge — 20 years after she won season four of the show back in 2005. As they gear up for the live shows to begin on the long-running singer competition,