Hell hath no fury like a woman scorned--but could that be a problem for Kelly Clarkson?

The singer and first season American Idol winner is known best for her chart-topping anthems about breakups and bad romance, but now that Kelly is in a happy relationship with talent manager Brandon Blackstock since late last year, she says the process of writing songs hasn't been the same for her.

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Despite currently promoting her latest release Stronger, the 29-year-old says she is already writing songs for an upcoming album and that the new tracks are happier than anything she's ever released. "I'm trying to write a tough song and it's coming out like butterflies and rainbows," she said. "With my new stuff, people are going to be, like, "What the hell happened to you?" I love it. It's an awesome problem to have." 

Fans will also get to see the softer side of Kelly when she appears alongside Robin Thicke, Lionel Richie and Jennifer Nettles as the stars of ABC's upcoming reality singing competition Duets.

Do you want to hear Kelly's happier songs?

Photos courtesy of Fame Flynet