Jessica Simpson tweets baby bump pic!

Jessica Simpson is celebrating her pregnancy body. 

The star, who is expecting her second childwith fiancé Eric Johnson, shared a daring self-portrait of her baby bump on TwitterSunday. 

Dressed in a bikini and a beach wrap that is hanging open, Simpson, 32, writes "Bumpin' and Proud!" She snapped the picture with a glittery iPhone. 

Simpson has been posting lots of photoswhile vacationing in Hawaii with Johnson, their 7-month-old daughter, sister Ashlee Simpson – who flaunted her flat tummy in abarely-there bikini on the beach – and other family members. 

Jessica Simpson proved that baby bumps look great in bikinis when she posted a revealing Twitter pic Sunday.

The pregnant star, who is already mom to 7-month-old daughter Maxwell, announced last week that she and fiance Eric Johnson are expecting their second child.

"Bumpin' and Proud!" she captioned the photo, which she took presumably while on vacation with her family .

The first picture Jessica shared with fans over this holiday was on Christmas Day: The image of her daughter wearing holiday pajamas and smiling in the sand atop the words, "BIG SIS," confirmed Simpson's pregnancy.