Just because she left Peepshow to have a baby, doesn't mean Holly Madison is done showing some skin!

The former star of "The Girls Next Door" showed off her (barely) growing belly yesterday during a bikini photo shoot by a pool in Las Vegas.

Wearing a pink and white gingham two-piece, Holly held onto her stomach while posing for cameras.

Madison is expecting her first child -- a girl! -- with party promoter Pasquale Rotella.