The Essex stars were joined by their very glam mum and aunt behind the tills at the boutique, where they wore various shades of pink to show their support for the annual charity event.
Sam – who is expecting her first child – said: "Breast cancer is a cause close to my heart and I am really happy to be supporting wear it pink again this year. There are so many ways you can get involved this October – from wearing something pink to work like Billie and I, to baking something pink for a cake sale at school.
"Whatever you decide to do, you can help Breast Cancer Now to fund vital breast cancer research to help stop women dying of this devastating disease. So what are you waiting for, find something pink to wear and sign up today."
Mum-of-one Billie added: "I am so excited to be supporting wear it pink once again as it's for such an important cause. We had a great day wearing pink outfits at work, even our mum and auntie got involved which was so fun! It's so easy to take part, I hope everyone can join in on Friday 23rd October and raise lots of money to help fund life-saving research into breast cancer."
Breast Cancer Now is the UK's biggest breast cancer fundraiser. It encourages people to make a donation and wear pink on Friday, 23 October. Other celebrities supporting this year's event include newlywed Strictly Come Dancing stars Kevin and Karen Clifton.
"I am so happy to be supporting wear it pink this year. I know first-hand what it's like to see someone close to you go through this awful disease, which is why I'm really keen to raise awareness and all-important money to help fund Breast Cancer Now's life-saving research," said Karen.
"Wear it pink is so easy! At home, work or school just grab something pink, bake something delicious or do something silly – just make sure you do it in pink and for a price."
Kevin added: ""Breast cancer affects men, women, friends and families so I'm thrilled to be supporting wear it pink to make sure that one day, no one loses their loved ones to this disease. Wear it pink is such an easy way for anyone to get involved and raise lots of money – on Friday 23rd October why don't you wear pink to work like us? Even just a tie, braces or socks – no excuse fellas!
For more information visit www.wearitpink.org
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!