Jessica Simpson liked collaborating with her sister Ashlee so much on a line of girls' clothing, they're moving on to maternity and baby wear.
Interestingly, it wasn't either one of the singing and acting sisters' ideas to work together -- it was their mom's suggestion.
"My mother thought it would be great to combine both of our styles, both of our personalities," Jessica Simpson told Fashionista at a launch party their tween and teen line at Dylan's Candy Bar in New York City. "But it feels like we always work together!"