The mum-to-be - who is expecting her first baby with fiancé Eric Johnson - joins the likes of Britney Spears, Myleene Klass, Claudia Schiffer and of course, Demi Moore by posing naked to proudly show off her baby bump.
The singer also took the opportunity to tell the fashion magazine that she is expecting a little girl, and is going to try her best to make her new arrival a girlie girl, as she doesn't want her to follow in Eric's sporty footsteps.
"I swear, I will croak if she asks me for a pair of Nikes instead of Christian Louboutins!" Jess told the mag. "Eric is so athletic - we're gonna have this athletic girl and I won't even be able to take her shopping, 'cause all she's gonna want is sports bras and Nikes!"
The heavily pregnant star, who has finally scrapped the skyscraper heels for comfy flip flops, also gave a few hints about baby names, claiming the couple have already picked out a "non-traditional" moniker:
"We're sure on the name. It's nothing shocking and nothing you'll have to add to the dictionary. Still, when people hear it, they'll know ... why."