The Saturdays singer is encouraging the nation to 'go as red as they dare' on 7 February to show their support and help raise money to fund life-saving heart research.
"I'm so excited to be supporting the BHF on 7 February by Ramping up the Red and joining the fight against the UK's single biggest killer, coronary heart disease," says Mollie.
"Whether it's wearing some red make-up, donning some striking scarlet red trousers, a traffic-stopping little red dress or painting your nails a racy red shade, join me and go as red as you dare on the day."
And we have to say Mollie looks red hot in the campaign pictures, channelling her inner Minnie Mouse while wearing a rouge leather pencil skirt teamed with matching nails and lips (of course!)
In another snap we see the 'Disco Love' singer mixing her prints by pairing a red tartan skirt with a cute monochrome polka dot shirt, while joining some fellow red wearers.
Showing us even more ways to wear the vibrant colour, Mollie then opts for towering heels and sweet frilly socks, completing her look with another tartan skirt and a bright cropped jumper.
"By organising a Ramp up the Red party with friends, families and colleagues, you will be raising funds that will go directly towards vital research, support and care to help mums, dads, grandparents or babies born with heart problems," says Mollie.
She adds: "It's so easy to organise and you'll be helping the BHF to continue to fund life-saving heart research in the UK to help everybody who suffers from a heart problem.
"It is a cause that is particularly important to me, as my grandfather sadly passed away after suffering a heart attack when I was younger."
For more information about Ramp up the Red, visit rampupthered.org.uk.
What do you think of Mollie's red outfits? Let us know by commenting below as the best comment across the site each week wins £50!
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