"Surprise Surprise (and it was a surprise!!) I’m really happy and excited to tell you that Dan and I are expecting baby number 3!!" she wrote on her website, OfficialHollyWilloughby.com.
"We feel blessed and very lucky to be giving Belle and Harry a little brother or sister later this year. Xxx"
Holly got married in August 2007 and she shares four-year-old son, Harry, and daughter Belle, almost two, with Dan.
"Holly Willoughby has impeccable taste and style. She always looks classy and fashionable and dresses appropriately for her age and the presenting work she does. She definitely has a pregnancy glow at the moment – she looks terrific", said one voter to website My1stYears.com who carried out the survey.
Another fans said of Kimberley: "Kimberley Walsh looks amazing. Her maternity outfits have been so her – very stylish, figure hugging and not straying too far away from what she normally wears."
Other celebs who gained votes included The Avengers actress Scarlett Johannson, whose pregnancy was unveiled by her producer in March, and model Erin O'Connor.