Watch Kelly Clarkson and Dolly Parton Flawlessly Harmonize Impromptu 'I Will Always Love You' Duet

During an episode of The Kelly Clarkson Show, Dolly Parton shared the story of how she first heard Whitney Houston's cover of her song "I Will Always Love You" for the movie The Bodyguard. Parton revealed that she was driving when she heard Houston's version on the radio and had to pull over because she was so overwhelmed. Parton also praised Clarkson for her performance of the song at the ACM awards. The two artists then sang a brief portion of the song together. They also performed a cover of Parton's "9 to 5" for the show's daily segment.