Carrie Underwood has joined the ‘American Idol’ judging panel. The 41-year-old singer has been confirmed as Katy Perry’s replacement on the hit TV show, meaning she’ll Lionel Richie and Luke Bryan on the panel for season 23. In an announcement video, Carrie – who won the fourth season of ‘American Idol’ back in 2005 – said: “I went from nobody knowing my name to tens of million of people watching the show. “I’m proud of everything that I was able to accomplish on the show and I’m so proud of everything I’ve accomplished since.” The award-winning star has returned to ‘American Idol’ multiple ti…