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OTRC: Jessica Simpson debuts bare baby bump in bikini photo (Photo)

Jessica Simpson appears in a photo posted to her official Twitter account on December 30, 2012. (https://twitter.com/JessicaSimpson/status/285514689872539648/)

Jessica Simpson is pregnancy "bumpin" - and she's showing it off in a new photo on her Twitter account.

Simpson, 32, recently announced that she's expecting her second child with fiance Eric Johnson, more than six months after giving birth to her first daughter Maxwell Drew.

On December 30, the second-time mom-to-be Tweeted a very proud photo for fans, putting her growing baby bump on display.

"Bumpin' and Proud!" she Tweeted and captioned the photo, which shows the singer and new mom in what appears to be a bathing suit and a cover-up.

On December 27, the singer shared a revealing photo of herself (Photo), days after she Tweeted that she is pregnant and talked about it in a new Weight Watchers ad, in which she also reveals she has lost more than 50 pounds thanks to the diet program.

In the picture, posted on her Twitter page on Thursday, December 27, the 32-year-old singer and fashion businesswoman shows cleavage while wearing what appears to be a red bikini top and matching, loose-fitting frock. She is smiling and sitting on a seat in a furnished room with a Christmas tree in the background.

"Fun in the sun..." she Tweeted.

On Christmas Day, December 25, Simpson posted on Twitter a photo of her daughter, dressed in a red and white striped onesie, sitting on a patch of sand with the words "BIG SIS" scrawled in it, surrounded by leaves.

"Merry Christmas from my family to yours!" she Tweeted.

Her rep confirmed to OTRC.com that the singer is pregnant.

Us Weekly had reported in late November that the 32-year-old singer and fashion businesswoman was expecting again.

Simpson had announced the news of her first pregnancy, which had also followed weeks of baby rumors, on Halloween 2011 via a photo of her dressed as mummy. Their daughter was born in May.

Simpson has often posted family photos on Twitter during holidays. She posted a photo of herself with Johnson and their daughter standing with fireworks behind them a day after the 4th of July. She also shared a photo of her fiance with their baby on Thanksgiving on her website.

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