GSI 1 / 14

Cat's out of the bag! Jessica Simpson's growing baby bump isn't the only thing that she's showing off these days. According to a source, the "Fashion Star" mentor is eagerly sharing the name she's already picked out for her second baby with her fiance, Eric Johnson.

"[She's] told people she's going to name the baby Ace!" the source told Us Weekly. Simpson, 32, is already mom to 10-month-old daughter Maxwell. The singer has yet to reveal how she and Johnson, 33, decided upon the name.

PHOTOS: Jessica Simpson's body evolution

Just last year, Simpson revealed that Maxwell's unique moniker came about as a tribute to both her and her NFL player fiancé's families.

Maxwell is Johnson's middle name, as well as his grandmother's surname, and Drew is Simpson's mother Tina's maiden name.

PHOTOS: Maxwell Drew's cutest moments

"It's nothing shocking and nothing you'll have to add to the dictionary," the bubbly mother-to-be told Elle last year prior to Maxwell's birth and name reveal. "Still, when people hear it they'll know ... why."

Simpson and Johnson first confirmed their second pregnancy via Twitter on Christmas day. And the expectant parents couldn't be more thrilled to expand their brood.

PHOTOS: Jessica Simpson's first pregnancy

"Motherhood is a dream," Simpson told Katie Couric back in September. "It really is absolutely amazing."


Celebs without makeup

Uma Thurman explains why she gave her daughter five names

BING: Unusual baby names