Kelly Clarkson truly struck a chord with audiences last Thursday (Feb. 25) when she performed her emotional new single "Piece by Piece" on American Idol's farewell season. As the original Idol singing an emotional song while 8 months pregnant with her son, Clarkson broke down in tears at the end of the song. Now, in a new interview with Ellen DeGeneres, the pop star and mother is opening up about why she was so teary on live TV and how the moment totally embarrassed her.

"I came off in tears almost for a different reason because I was so embarrassed. I was like, 'Oh god, this is my final thing on Idol and I like could not hold it together.' I was almost losing it the entire song. I was proud of myself for making it as far as I did," she said. "My husband knows me well. I came right off stage and he was like, 'Don't ruin it. Don't ruin the moment.' I was like, 'It was so embarrassing!'"

Though Clarkson may have been embarrassed, she had all the reason to be emotional. Beyond the pregnancy hormones and the touching song about finding a father and love after being abandoned by her own dad, she saw her baby girl River Rose Blackstock roaming the same halls she did 15 years ago.

"My daughter was 1-year-old running around the same hallways; I was 19 on the show," she said. "And the song is incredibly sad but hopeful. A lot of us didn't have a bar to set in relationships in any form. My sister and I had this conversation and I wrote this song afterward, about how lucky we are. We both found incredible fathers, lovers and men and partners and everything. I feel really lucky because a lot of girls with daddy issues don't end up happy, they end up going the same."

And the whole Idol appearance was a family affair for the Clarkson-Blackstocks.

"[Husband Brandon Blackstock] was at Idol, my little girl was there, my little boy was turning circles in my stomach. It was nostalgic," Clarkson explained. "It was the last time I was going to be on Idol and it's ending. I was screwed from the get-go. Emotionally, I'm on a slip slide to hell."

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