Celeb bump day: Uma Thurman, Sienna Miller and more!

Vanessa Lachey

Hot mom-to-be! Vanessa Lachey may be pregnant but that didn’t stop her and her husband Nick Lachey from helping launch the hottest new bar in Sydney, Australia, called The Star! The expecting parents joined Paris Hilton, Slash, Joe Jonas and more as they partied the night away and listened to a performance by Redfoo from LMFAO.

Photo Credit: James Morgan

From Reese Witherspoon to a newly pregnant Tori Spelling, check out more of our favorite celebrity baby bumps >>