Celeb bump day: Uma Thurman, Sienna Miller and more!

Kristin Cavallari

Pregnant reality star Kristin Cavallari was spotted at Ulta Beauty in West Hollywood, California, picking up “21 Days of Beauty” special offers to update her spring beauty collection.

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Cavallari looked chic in a black furry vest paired with a black tee, leather shorts, black opaque tights and black booties.

“My stomach literally grew double overnight,” the Laguna Beach alum recently tweeted. “This belly came out of nowhere!”

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Photo credit: Michael Simon