Kelly Clarkson is no stranger to taking a popular song and turning it on its head with a different genre on the popular “Kellyoke” segment of her eponymous talk show.

But her latest cover has fans so wowed that they’re calling her “one of the greatest singers of all time.”

The American Idol alum is marking the release of Wicked, bringing on stars from both the Broadway version and the new film adaptation of the play as guests on her talk show. Wicked is based on The Wizard of Oz, and Clarkson drew inspiration from that for the musical segment on the Nov. 19 episode of the program.

A video posted by the show’s Instagram account began with Clarkson standing at a microphone wearing all black as green lights shined bright behind her. She started off with a slow, soulful interpretation of the Scarecrow’s signature song “If I Only Had a Brain,” reimagining the lighthearted tune into something much more sinister.

Effects gave her voice a spooky, ethereal reverb and her band began to play. As Clarkson built up her vocal power, the band kicked it into high gear until the intensity in Clarkson’s voice was matched by the electric guitar wailing alongside her.

Fans were blown away by the performance, stating that “She can make any song be amazing! Best voice ever!”

Others concurred, writing, “Wow!! I agree that Kelly Clarkson is one of the greatest singers of all time. That was amazing!!” and “She can sing ANYTHING beautifully!! 🔥👏❤️.”

Many compared the song to something out of a James Bond movie, writing, “Made a wizard of oz song to a Bond song that’s impressive” and “This James Bond arrangement is BONKERS, in the best way.”

Several fans wanted to see Clarkson take her talents to Broadway, commenting, “We need Kelly clarkson in a musical ASAP! This was WICKED good 💚.” Another fan wrote, “KC for Broadway. Y’all,” and a third said, “Broadway, take notice! She’s coming for you one day. Best advice is start preparing now!”

One fan even went so far as to ask “Why didn’t Wicked cast Kelly Clarkson?”