Jessica Simpson talks surprise pregnancy: 'Protection went out window'

Jessica Simpson has joked that her second pregnancy came totally by surprise.

The Fashion Star mentor and Eric Johnson announced that they are expecting a second child in January, with Simpson later joking that she will now keep her legs crossed.

Twitter / Jessica Simpson

Jessica Simpson at 'Ellen' taping

Simpson was in the midst of an interview on The Ellen DeGeneres Show, when she joked about the circumstances surrounding her pregnancy.

"I don't know, apparently protection was just thrown out the window," Simpson teased, adding: "We were definitely extremely shocked."

The 'With You' singer also admitted to Ellen DeGeneres that the second pregnancy has been far rougher than when she was carrying daughter Maxwell.

Twitter / @JessicaSimpson

Jessica Simpson in the early stages of her pregnancy

"Like with Maxwell, I felt amazing," she recalled. "Like, I could do everything, eat everything. Do whatever I wanted.

"I had a lot of energy. This time around... I'm like, exhausted, eating Tums. That's my snack of choice!"

It was recently reported that Simpson has decided on the name Ace for her and Johnson's second child.

Watch Jessica Simpson on The Ellen DeGeneres Show below:

Jessica Simpson