Former Playboy Playmate Holly Madison sure is happy to be showing off her growing baby bump.

OK! GALLERY: HOLLY MADISON HELPS HER PUPS IN PINK

Ever since the ex of Hugh Hefner announced that she is expecting a little one, she has been glowing with excitement. And she sure did yesterday as she attended the launch of her Lucky Pet Products line at the SuperZoo 2012 Convention at Mandalay Bay resort in Las Vegas.

OK! GALLERY: HOLLY MADISON: SIN CITY SWEETIE

Between cradling her baby bump and posing with a little tyke, Holly seemed like a natural. We can't wait to meet Holly's baby!

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