Kristin Cavallari shows off baby bump on Instagram

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Former "The Hills" star Kristin Cavallari is already showing from her second pregnancy. After confirming that she and her husband Jay Culter are expecting baby no. 2, she took to Instagram to flaunt her growing baby bump.

The picture wasn't even taken to show off her new baby on the way, but instead to promote a T-shirt she got from People Style Watch magazine. "Early holiday gift from @peoplestylewatchmag!" she posts. "Check out this @thehomet and more great gift ideas in the December issue on sale Nov. 22! A percentage of the proceeds from sales go to multiple sclerosis research :)"

Cavallari and Cutler are already parents to Camden, who they gave birth to in August 2013. According to them, Camden is excited for a sibling.

"Thank you for all the love!!" Cavallari tweeted to fans after announcing the baby news. "We are so excited for Camden to be a big brother!"

Photo/Video credit: Instagram