Carrie Underwood couldn't hold back ... also documenting some of Underwood's first moments in the judge's chair. Of course, as an Idol alumna herself, the "Cry Pretty" singer's got special ...

Carrie and I had ... had frosted tips. Underwood is the first-ever American Idol winner to return — two decades later at that — and sit in the judge’s chair to find, essentially, the next ...