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Kelly Clarkson Cries During Emotional 'American Idol' Return Performance

American Idol Kelly Clarkson
Ray Mickshaw/FOX via Getty Images

Judges Keith Urban, Jennifer Lopez, guest judge and Season 1 winner Kelly Clarkson and judge Harry Connick Jr. onstage at Fox's American Idol Season 15 on Feb. 25, 2016 in Hollywood, California.

Kelly Clarkson gave quite the emotional performance on Thursday, when she performed after being a guest judge on American Idol.

The first Idol winner returned to the stage to sing "Piece by Piece," a heartfelt song about her father who left her when she was six years old. She wrote the song, while she was pregnant with her first child, about how good of a father her husband is and will be.

'American Idol' Recap: Final Top 10 Sing for America's Vote, Kelly Clarkson Comes Back to Judge

As she neared the end of the song, Clarkson had to stop briefly to compose herself as she started crying. She received a standing ovation from Ryan Seacrest and the three judges, and Keith Urban cried as she performed.

After her performance, Seacrest joined her on stage to talk about her experience. “I’m pregnant, and it’s nostalgic, and I can’t believe it’s the last season,” said Clarkson, adding that she's proud she got through most of the song before "bawling."

“It’s just a touching song for me,” said the singer, “because I wrote it about my little girl when I was pregnant, and now I’m pregnant with my little boy.”

Not long after it aired on the East Coast, Clarkson's "Piece by Piece" soared into the top 10 on Billboard + Twitter's Trending 140 real-time chart, peaking at No. 2 Friday morning.

This article originally appeared on The Hollywood Reporter