Steven Tyler and Carrie Underwood perform this past April at the Academy of Country Music Awards in Las Vegas. The singers will team up again the night before the Super Bowl for a "CMT Crossroads" special. (Associated Press)

Steven Tyler and Carrie Underwood perform this past April at the Academy of Country Music Awards in Las Vegas. The singers will team up again the night before the Super Bowl for a "CMT Crossroads" special. (Associated Press)