Once upon a time Jessica Simpson was married to Nick Lacey, the marriage didn’t work out and the two moved on and started their own families. Fast-forward nine years and Simpson has called the marriage her “biggest money mistake.” Ouch!

In an interview with CNBC on Thursday, Simpson opened up about the failed marriage and said that it was her worst decision financially speaking.

"Biggest money mistakes? I don't know. For some reason I thought of my first marriage!" she said.

The pop sensation turned fashion designer, who now has an empire valued over $1 billion, didn’t elaborate on that, but host Kelly Evans laughed with her and said that is actually a very common answer.

This marked a rare occasion in which Simpson talked about Lachey. Last year, he told Jenny McCarthy that they are not enemies, but they don’t keep in touch these days.

Simpson married former NFL tight end Eric Johnson and Lachey is married to his wife Vanessa, who is a previous Miss Teen USA winner and television personality.

Image courtesy of Alberto Reyes/INFphoto.com