The girls performed their new track 'Something New' during the results show of the Wembley Arena special.
Dressed in metallic silver dresses, the girls brought the house down as they strutted their stuff to the 6,000 audience members.
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Over in the competition in was time to say goodbye to another celebrity.
Tess Daly revealed that Nicky Byrne and Richard Arnold had polled the lowest combined judges scores and public votes meaning they would have to compete against each other in the dreaded dance off.
After a tense dance off it was Nicky's Jive that impressed the judges most meaning that Richard was the next celebrity to be eliminated from the competition.
On casting his vote Craig Revel Horwood said:"Just for sheer exuberance and energy, I am going to save Nicky and Karen."
Darcey explained her decision saying: "Well you both performed very well tonight, but for content and energy as well, I am going to save Nicky and Karen."
While Bruno echoed his fellow judges sentiments saying: "Both highly entertaining, but I have to go as well with power and content, and that was delivered by Nicky & Karen."
On leaving the show, Richard told host Tess Daly: "I always thought I'd miss the wardrobe most, but I don't think I will, I will miss Erin Boag, who - every Monday - it's like climbing a mountain, and every Monday she'd say 'welcome to another week. I'll miss that on Monday"
Strictly Come Dancing returns next Saturday on BBC1.