The former Strictly Come Dancing star told HELLO! online: "Kate Middleton has the hardest job in the world, she sets a great example for young girls. She's conservative, modern, elegant and feminine all at the same time."
Holly added: "I like that she wears local designers I think that's really patriotic of her and cool, she is a brilliant ambassador for this country!"
Although the Australian, who has a starring role on the judging panel of hot new fashion show, Ultimate Shopper, would be pleased if Kate upped the ante. "If I'm honest I want her to look like a princess and if she's wearing clothes from the high street I don't find it endearing, I want her to be mega like all the [other] princesses around the world."
In the show that will make its UK debut on TLC Holly plays her part as the sharp tongued critic with a penchant for cutting comments. She also adds humourous honesty that is complemented by fellow judges Brix Smith-Smart and Jason Gardiner, the latter who will join the panel in series two. Along with a guest judge the trio task three ladies with a challenge to dress for such as a job interview or afternoon tea, the contestants then have just 20 minutes to find an outfit in the show's shop as they battle it out to be crowned the 'ultimate shopper'.
Kate Middleton wearing a Topshop dress
And no one is safe from their style slamming, not even the Duchess of Cambridge, as Holly's colleagues joined in on the critique with Brix Smith-Smart revealing she believes the mother-to-be is ageing herself.
"Kate Middleton has a hard line to walk because of all the attention there was on Diana's fashion," Brix said. "She's always respectful but I think she dresses a little too old – she's playing it very safe but I don't think she's put a foot wrong. I'd love to see her have more fun with fashion!"
Jason Gardiner who found fame with his no-holds-barred judging style during Dancing On Ice joined in on things adding: "Kate is a very beautiful girl, but what is she doing with those shoes?" His partner in critiquing crime, Holly, couldn't contain a laugh at this point, which prompted Jason to continue with: "Those horrible black shoes, they look like the Queen told her to put them on."
Holly and her husband, Nick Candy, and her Ultimate Shopper co-star, Brix Smith-Smart
To provide the perfect balance, required of any reality TV show guest judge, Italian fashion expert, Carla Gozzi proved that whatever your opinion of Kate Middleton's wardrobe choices, you can't fault her influence…
"In Italy Kate is loved," Carla revealed. "She's an inspiration for young girls because she started to wear these nude tights everyone in Italy is wearing them now, they are a big hit."
And with a colourful and sometimes chaotic collection of judges Ultimate Shopper is set to be a hit too!
Ultimate Shopper premieres at 8pm on 6 June on TLC