Leave it to Paris Hilton to provoke two hormonal women at the same time. In the early hours of Sunday morning, the self-promoting starlet hit the stage at hot spot LAX in Las Vegas and sent a message to Christina Aguilera, who was hosting the jam-packed bash.

"Congratulations to the most beautiful pregnant woman in the world -- Christina Aguilera," Paris baby-talked to the pint-size chanteuse. "You're gorgeous."

The problem?

Aguilera has carefully avoided commenting on her noticeably swollen belly, which People reports Hilton was touching just before she grabbed the microphone.

In the process of outing Christina's bun in the oven (on video, no less), the jailbird-turned-would-be-do-gooder also managed to diss frenemy Nicole Richie, who is awaiting a stork visit of her own.

We can only hope Nicole earned the runner-up prize in the "most beautiful pregnant woman" pageant that appears to be taking place in Paris' head.

Christina, to her credit, reacted with grace to the revelation.

Christina Aguilera at LAX (Chris Weeks/WireImage.com)

People reports the chanteuse, wearing a loose-fitting pink chiffon baby doll dress and hiding her apparent pregnancy glow beneath several layers of face paint, appeared "temporarily shocked" and lowered her head onto hubby Jordan Bratman's shoulder as her pals looked on "stunned."

Within moments, however, the couple exchanged a look and began laughing as the crowd cheered around them.

At least Aguilera can take comfort in knowing that while Paris may have succeeded in stealing her thunder, she was less successful in stealing her trademark cemented, cotton candy peroxide coif.

Hilton sported the dire 'do at the VMAs, unwittingly transforming herself into Betty White's slightly less sexy sexagenarian doppelganger.

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