Ashlee Simpson is not going to give birth to twins according to sister Jessica.

The Newlyweds star came out with the news when she declared her excitement at the thought of being an aunt.

Jessica said, “I'm going to spoil the kid rotten, that's for sure. I think my sister's going to be pretty strict, actually, because she's been so good throughout her pregnancy.

“She's just such a woman. I'm like, 'Oh, my gosh - what's happened to my sister?'"

The pop star went onto say that it is, “Definitely not twins!" finally laying suspicions of two babies to rest.

Showbiz families are all the range these days – with sisters, brothers, aunts and uncles all riding off each other's success – so how long will it be before baby Simpson makes a name for itself?

Ashlee and hubby Pete Wentz are reportedly having their baby in October.

The Simpson sister looked glowing at the VMA's...