Jessica Simpson has had an eventful week.

First, Simpson, 32, confirmed speculation that she is pregnant. On Dec. 27, she tweeted a sexy photo of herself flaunting her looks in a red dress and cowboy hat, which went viral. Another interesting photo of the "Fashion Star" mentor has also been released, showing the country singer wearing an oversized green sweater - one that she has owned for seven years.

View the photos of Jessica Simpson's 'magic sweater' she wore to the beach.

Simpson spent her holiday vacation with her family in Oahu, Hawaii. On Christmas Eve she was photographed wearing an oversized Theory sweater with Ugg boots in 82 degree weather on the tropical island. Clearly, she was trying to cover up her baby bump because the pregnancy rumors had been swirling for weeks prior to the trip.

The next day, on Dec.25, the fashion mogul made her announcement in a non-traditional way - she tweeted a picture of her 7-month-old daughter Maxwell Drew with the words "Big Sis" inscribed in the sand.

Simpson gave birth to Maxwell on May 1, then lost the 60 lbs she gained during her pregnancy throught her Weight Watchers deal.

Weight Watchers confirmed that she will remain the spokesperson of the leading weight loss brand on Twitter.

"Congrats to @JessicaSimpson, Eric and big-sister-to-be Maxwell! Your WW family is so thrilled for you. What an amazing year you've had! (sic)" the diet company tweeted.

The firm have also announced they will continue to run ads promoting the 32-year-old beauty's 60lb weight loss, as well as pushing a new commercial in which she announces her pregnancy.

A Weight Watchers spokesman told ABC News that "there has not been changes made" to their business agreement with Simpson while adding that she will not continue the program during her pregnancy.

Simpson "will not be following the program during the pregnancy while her weight and well-being are monitored by her obstetrician, as is recommended for any woman during pregnancy, " a spokesman told ABC News. "After she gives birth, Jessica and her doctor will decide when she may resume following the Weight Watchers program."

Tags
Jessica Simpson, Celebrity baby, Pregnant