The Mamma Mia! star couldn't contain herself after singing her favorite power ballad with the original artist.

Amanda Seyfried just checked something huge off her bucket list.

Seyfried referred to the live version of Clarkson's "Beautiful Disaster" as the "power ballad of this century" ...

We’re already obsessed!

When Kelly Clarkson’s talk show guest Amanda Seyfried, 40, told Clarkson on Tuesday that her song Beautiful Disaster was “the ...

Lizzo and Kelly Clarkson are both extremely talented on their own, but together, they're "Good as Hell." The pair even proved it by singing the song of the same name while sharing a stage together ...

The Kelly Clarkson Show' featured incredible vocals from Kelly Clarkson during her 'Kellyoke' moments. Here are the most iconic songs.

Kelly Clarkson’s ability to sing in Spanish is muy bien. The original “American Idol” winner joined Gloria Estefan in singing Estefan’s 1993 hit “Mi Tierra,” entirely in Spanish. “I love all of your ...

Amanda Seyfried previously played the character of Sophie in the film adaptation of Mamma Mia! and its sequel, Mamma Mia!