Jessica Simpson thinks she's having a girl

Jessica Simpson is all about flaunting her baby bump these days -- and she's not afraid to make a prediction about the sex of her growing bundle of joy. "I think it's a girl," Simpson, 31, told People last week in New York City. "But I don't know yet."Simpson's fiancé, Eric Johnson, isn't so sure."I think it's a boy," Johnson said while at a later appearance in Brooklyn. "We're pretty much at a standstill there." He added that they will probably find out before too long because the singer can't wait."I don't think we can wait," added the former NFL player. "Jessica is too honest about everything, she needs to know. I don't think she can hold that secret to herself."Simpson finally revealed her pregnancy with a playful tweet and photo on Halloween. The statement ended months of questioning over the fashion mogul's growing belly."Pregnancy is a friend of mine, so everything has been running smoothly," Simpson said a few days after the announcement. "So far, so good -- no morning sickness. I feel great. I'm tired, but you know, I'm making a baby here!"She added that the pregnancy was a surprise, but a blessing."I did the pregnancy test. I was feeling a little off," she said. "[I first told] Eric, of course. He was in the house. He didn't know that I was taking a pregnancy test, so I kind of shocked him. I came in shaking like, 'Oh my gosh! Oh my gosh! This is happening!' We both cried. We were in shock and kind of just sat there and stared at each other."The mom-to-be is already working on her unborn child's fashion future -- she's releasing a clothing line with her sister, Ashlee Simpson."If it's a boy," she joked to People, "I'll put him in tutus!" Let's hope that it's a girl!