Jessica Simpson has posed nude for April's issue of Elle magazine and has finally confirmed that she is having a baby girl with fiancé Eric Johnson, but the couple are not yet ready to reveal their baby's name.

The 31-year-old, who is reportedly due to give birth at any moment, recently opened up about her fears that Johnson may turn her baby- who she refers to as "she"- into a tom boy, according to Elle Magazine.

"I swear, I will croak if she asks me for a pair of Nikes instead of Christian Louboutins! Eric is so athletic. We're gonna have this ath-a-letic girl and I won't even be able to take her shopping," Simpson told the magazine.

The pop singer also revealed that she and Johnson, a former NFL star, have selected a "nontraditional" name for their baby, although she insists that it will be more common in comparison to some unusual Hollywood baby names.

"When people hear [the name], they'll know ... why. [It's] nothing shocking and nothing you'll have to add to the dictionary," Simpson said.

Some fans immediately took to Twitter speculating that Simpson may have named the baby "Tina Ann" after her mother, as the two often display a close mother-daughter bond.

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The "I Wanna Love You Forever" singer began dating 32-year-old Johnson in May 2010, and by November of that year, the couple were engaged.

While the pair had initially planned to walk down the aisle in November 2011, the date was later postponed due to Simpson's unplanned pregnancy.

Simpson appears to be enjoying her pregnancy, despite admitting that changing her diet has not been easy.

"Givin' up my Scotch? My Macallan 18? That was hard for me! Though now being pregnant, you crave other things. A big thing of water sounds great!" Simpson said.