Amanda Seyfried could barely contain her excitement when she finally got to sing alongside Kelly Clarkson, collapsing into pure joy after performing her all-time favorite song with the pop superstar.

The Mamma Mia! star couldn't contain herself after singing her favorite power ballad with the original artist. Her response when they wrapped up singing has viewers hitting replay again and again.

Never forget Amanda Seyfried is a great singer. The 40-year-old actress appeared on the Tuesday, Jan. 27 episode of The Kelly Clarkson Show and professed her love for the host's live recording of her ...

With The Testament of Ann Lee now playing in theaters, Amanda Seyfried tackled a completely different musical genre during a recent appearance on The Kelly Clarkson Show. During her visit, which aired ...

The Testament of Ann Lee soundtrack list explored- all songs, Amanda Seyfried vocals, Daniel Blumberg score and how they shape the Shaker musical drama.

Get the latest news about Mamma Mia. Find exclusive interviews, video clips, photos and more on Entertainment Tonight.