Carrie Underwood & Steven Tyler: CMT Crossroads!

Carrie Underwood and Steven Tyler rehearse for their CMT Crossroadsspecial on Thursday (February 2) at Indiana State Fairgrounds in Indianapolis, Indiana.

The 28-year-old American Idol alum and current Idol judge previously hit the stage together at last year’s Academy of Country Music Awards where they sang “Undo It” and “Walk This Way.”

“I just love to sing and I love [Carrie's] stuff. A good friend of mine writes songs with her,” Steven recently told the Associated Press.

“When I heard ‘Undo It,’ I said, ‘What is that?’ That is an Aerosmith song, right? I am going to finish recording that with you. He said, ‘No, I wrote that with Carrie, it is coming out in a week,’” he added. “I met her and it was all over after that, once I looked into her eyes. She opened her mouth and sang and she is that good. I loved singing with her.”