The blonde siblings – who are about to fly off to Las Vegas - slipped into their sexy pink costumes for a day of pampering at exclusive Essex salon De Luca Beauty.
It's all in aid of Breast Cancer Campaign's wear it pink event, which asks the British public to wear pink for the day to help raise funds for cancer research.
Sam said: "wear it pink is so fun and so simple. All you have to do is round up your friends from home, work or school, wear it pink on Friday 25th October and donate just £2 to Breast Cancer Campaign!"
Billie added: "I didn't realise it was so easy to be so heroic! By wearing it pink for just one day, we can all fund research that saves lives."
If you fancy following in the sisters' footsteps, you can find out more about wear it pink here. (Though we can't guarantee you'll look as glam as these two!)
Of course, Sam is no stranger to being a pink-clad superhero. Last year, she played the part of Super Woman to perfection for Breast Cancer Campaign, donning a sultry secretary's uniform, before jumping into a telephone box and transforming into a superhero. Sam and Billie also supported last year's wear it pink's Big Night In event.
Breast cancer is the most common cancer in the UK and accounts for nearly one in three of all cancers in woman.