Jessica Simpson and her sister Ashlee arrived at LAX this evening. They were off celebrating pal Lauren Zelman’s bachelorette with friends, including Cacee Cobb. Last weekend, Jessica was all about business as she attended the TCAs with Nicole Richie in Pasadena, where they promoted their new reality show, Fashion Star. In addition to discussing their upcoming project, Jessica revealed that she’s planning to design a maternity line now that she understands a pregnant woman’s clothing needs. It’s going to be a busy few months for Jessica, since the TV series debuts in March and she’ll soon welcome her first child with fiancé Eric Johnson.