'American Idol' alum Carrie Underwood admits the 'big problem' she faces in new role as judge

As Carrie Underwood prepares to take Katy Perry’s seat on the "American Idol" judging panel, the country superstar confessed a challenge she will face. 

When asked what kind of judge she would be on the popular singing competition show, she admitted, "I do have a big problem … I can’t lie."

"I feel like I’ll be very honest but hopefully constructive and encouraging," Underwood told "Good Morning America," ahead of her debut. 

'AMERICAN IDOL' ALUM CARRIE UNDERWOOD REPLACING KATY...