BEIJING, March 8 (Xinhuanet) -- Singer, actress, and fashion designer Jessica Simpson has confirmed she is having a baby girl when she posed nude for the cover of Elle's April issue out in news stands Wednesday.

Simpson also told Elle that she and fiancee Eric Johnson, a former National Football League (NFL) star, have already selected a "non-traditional" name for their baby, and said " (It's) nothing shocking and nothing you'll have to add to the dictionary".

"Eric is so athletic - we're gonna have this athletic girl and I won't even be able to take her shopping," she added.

The 31-year-old mom-to-be revealed in the interview that the biggest obstacle she has to face during the pregnancy is abstaining from alcohol, and she also mentioned the baby is expected to be weigh in at a healthy weight.

The singer-turned clothing mogul and upcoming judge of the reality TV show "Fashion Star" confirmed she was pregnant with Johnson's child in October, one year after they announced engagement in November, 2010.