As Jessica Simpson prepared to walk down the aisle with fiance Eric Johnson, she is taking a super laid-back approach to the wedding planning part this go around.

"I'm very comfortable," Simpson tells Extra. "I'm not a bridezilla. With a wedding, it should be a celebration. We should all be having fun ... Every single person there. We should just be celebrating our love."

And as for the date for her big day? "I've heard people throw around dates and not one of them has nailed it," Simpson laughs. "Not even close!"

While the wedding will be a simple one, Simpson says there will be one aspect that will be huge, which goes without saying.

"The dress is going to be amazing," she gushes in her interview, admitting that she hasn't found it quite yet.

Seeing how Simpson is a clothing and fashion designer, she should have no problem picking out a dress and style that fits her needs! Simpson recently joined forces with her younger sister Ashlee Simpson to design a tween clothing line, expected to hit stores later this fall.

In the meantime, Simpson fans can catch her on NBC's new reality show, 'Fashion Star,' where the 31-year-old will be a mentor to aspiring designers. "It's a fun show to be a part of, and we all get to dress up," Simpson says.

Look for 'Fashion Star' to premiere on NBC later this fall.

Watch Extra's Interview With Jessica Simpson