Hot damn! If there was anyone out there still wondering if Stacy Keibler was sporting a baby bump earlier this week, her new Instagram photo should make it pretty clear that there's no bun in her oven .

Keibler tweeted her very first photo with the popular app , and it's a doozy. George Clooney's girlfriend, a former WWE wrestler, showed off her rock-hard abs in a sexy, mid-workout photo.

The temperature seems to be rising outside -- and we think Keibler's Instagram photo may be the reason . Check it out below:

I am officially on @instagram ! :)instagr.am/p/MGbHhFpU-3/

Stacy Keibler (@StacyKeibler) June 20, 2012

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