The actress, now best known as Chantelle on EastEnders, originally found fame in the dance group, who shot to fame in 2013.
The Scottish group – completed by Shereen Cutkelvin, Amira McCarthy and Asami Zdrenka – had two top 10 hits before splitting in 2015.
Their hits include nightclub bangers Trouble and Braveheart.
But Jessica, now 28, is best known for her role on the East End, and entered the Welsh castle tonight in a bid to be crowned I’m A Celeb’s first Queen of the Castle.
Viewers couldn’t quite get over the throwback, and couldn’t quite believe the connection once it was revealed to them.
As a result, Neon Jungle was trending within minutes
Jessica got off to quite the start on I’m A Celebrity by immediately being thrown into the action.
Alongside Giovanna Fletcher, Vernon Kay, Jordan North and Victoria Derbyshire, Jessica was tasked with retrieving rucksacks for camp… by abseiling down a cliff edge.
Initially terrified, she managed to pull through – although it didn’t take her long to get upset at the realisation of missing her young daughter.
Thankfully the girls were there to rally round her.
I’m A Celebrity… Get Me Out Of Here! airs nightly at 9pm on ITV.
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