Jessica Simpson Baby Bump Grown Bigger, Spotted in Causal Gym Outfit [PHOTO]

Jessica Simpson's baby bump has gotten visibly bigger. The singer known for her dressy studs is seen in sweats en route to the gym.

The "Fashion Star" mentor, a mother of one and soon to be two seems to have less time to dress up in fancy couture pieces. She was seen in green sweat pants, matching black tank and hoodie and large sunglasses on Wednesday.

Simpson revealed the sex of her second child in her recent appearance on "Jimmy Kimmel Live," as she said, "I just feel awful, I've been vomiting. The crazy thing is, I never knew that a wiener could actually make me nauseous."

She then added, "Well, I guess I just the world that I'm having a boy!"

Also shared about her second pregnancy being a bit more difficult, "With Maxwell, I felt amazing. Like I could do everything, eat everything. Do whatever I wanted. I had a lot of energy. This time around... I'm, like, exhausted. Eating Tums. That's my snack of choice.

"I think originally I had wanted three, and now that I have one and another one on the way, I feel like I could stop here. It's a lot of work. Obviously it pays off and it's totally worth it, but it's a lot of responsibility."