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CaCee Cobb

JuanSharma/Bruja, PacificCoastNews.com

Jessica Simpson's best friend CaCee Cobb is showing off her baby bump in a teeny tiny bikini.

Cobb—who announced that she and her Scrubs star hubby, Donald Faison, are pregnant with their first child together—hit the beach about a month ago to debut her growing belly.

In the snapshot, taken back in December, Cobb was already rocking a baby bump (but still looking fit!) while vacationing in Hawaii.

The mommy-to-be kept it stylish in a black two-piece bikini and wayfarer sunglasses.

"Looks like @donald_faison and I are going to have a little stormtrooper of our own!" Cobb tweeted yesterday along with a photo of a baby blue onesie with a Star Wars stormtrooper on it.

We can't wait to know if the pregnant besties are having boys or girls!