Jessica Simpson on 'Fashion Star' and Pregnancy Cravings

Fashion mogul and mom-to-be Jessica Simpson chatted with "Extra's" Mario Lopez at the NBC TCAs about her new reality show "Fashion Star" -- and her pregnancy cravings.

"I had a buttered Pop Tart this morning," Simpson confessed. "Random... I'm eating a lot of stuff that I ate in my childhood. Kraft Mac n' Cheese, Pop Tarts, Cap'n Crunch. I give in to my cravings. I'm like 'Yeah, I can do it. We'll worry about the rest afterwards."

Simpson also said she hasn't yet found out what the sex of her baby is. "I feel like it's already going to be a shock, like, whoa I just pushed that out, you know?"

As for her new show, "Fashion Star," think "The Voice" meets "Project Runway," in which Simpson, Elle Macpherson, Nicole Richie and John Varvatos mentor wannabe fashion designers. Jessica explained, "What we're really looking for is someone who can sell to H&M, Macy's and Saks Fifth Avenue."

Who are some of Simpson's celebrity fashion inspirations? "I always think that Sienna Miller is really cool, but then I also look at like body types like a Salma Hayak and Halle Berry. Girls that work their curves."

"Fashion Star" debuts March 13 on NBC!