Jess vs. Kim! Who has the biggest empire of them all?

Jessica Simpson takes on Kim Kardashian! The two Hollywood bombshells are neck and neck in a race to see whose empire reigns supreme, and Showbiz Tonight has the great debate.

Reality TV star Tia Mowry and entertainment journalist Rachel Zalis weigh in on who they think is winning, and for Mowry there is no question it's new Mommy Simpson! "Jessica Simpson is extremely relatable, she's down to Earth, she's the girl next door and now she's a mommy so it's great she can branch into that mommy brand... I don't know if I would buy anything if you know Kim Kardashian had a baby line," explains Mowry.

Tune in to Showbiz Tonight at 11pm ET/PT to decide who you think is a bigger star - J-Simp or Kim K.