It's the Internet buzz phrase of the day: Is Kelly Clarkson pregnant?

The original "American Idol" winner returned to the Fox stage last night to perform her latest single "My Life Would Suck Without You" before a panel of her former judges: Simon Cowell, Randy Jackson and Paula Abdul.

The Grammy-winning songstress - clad in a form-fitting black mini-dress, knee-high black boots, tights and a shimmery sequined shrug - rocked out the song from her new album "All I Ever Wanted" and strode confidently across the stage.

She looked a bit curvier than she did at the Grammy awards in February, and immediately the rumors started to fly.

But a Clarkson rep at her record label RCA - a division of Sony Music - tells the Daily News the buzz is dead wrong: "She is not pregnant."

The singer chatted with host Ryan Seacrest on stage, who asked if her new song was written with a special someone in mind - to which said no, adding she is not currently in a relationship.

But that didn't stop the fans from speculating.

Clarkson wowed the "Idol" fans at Wednesday night's results show, performing after hip-hop star Kanye West.

Asked by Seacrest how it felt to return to her old stomping grounds, she said, "I feel like I'm going to be judged."

If Abdul's dancing along to her tune was any indication, she would have greenlighted her to the next round.