Jessica Simpson  mixed things up in a tight, black sequined dress for last night's NBC TCA party in Pasadena, CA. Jessica was coming off a long day of press, but she was still in great spirits — and extremely high, spiky heels — to stop by the bash. Earlier in the day, Jessica joined Nicole Richie to talk Fashion Star , their new reality show which is coming this March. Jessica also revealed her plans for a maternity line, something she's an expert on now that she's expecting her first child with fiancé Eric Johnson. Jessica and Eric make up one of the many engaged celebrity couples , though they are saving their "I dos" until after the arrival of the baby.