Although she is frequently seen looking glam in heels and figure hugging frocks, Mollie decided to have some down time yesterday (17 November) with her siblings and dressed accordingly in casual black leggings, a waterproof jacket and a pair of trainers.
The songstress also scraped her trademark blonde hair up into a ponytail and even donned a safety harness at one point, as she tested out an adrenaline filled adventure course in the tree tops, courtesy of outdoor activities company, Go Ape.
Her sisters Ellen and Laura also looked prepared for their action packed day in a sporty ensemble of jeans and body warmers.
After they'd completed the course, Mollie posted a snap of the trio and wrote: "Kings of the jungle!!! Boom chica wow!!"
She also treated her Instagram followers to a fun video clip of herself trying out one of the high-speed attractions at the forest and whizzing into a giant net.
Mollie captioned the video: "Well that was graceful Nothing like some sisterly support."
No doubt the 26-year-old pop star was happy to have a break with her sisters, as she has been working hard lately with her bandmates in show rehearsals and keeping busy as the new brand ambassador for Maybelline cosmetics, as well as attending numerous showbiz parties in the capital!
Have you ever tried out the Go Ape adventure course? Let us know below!