Part of Strictly's final four, Frankie will go head-to-head with Mark Wright, Caroline Flack and Simon Webbe for the show's Mirrorball trophy.
But, as she tries to master three dances - including a much anticipated show dance - for Saturday's show, the singer has admitted the pressure is getting to her.
Speaking on ITV's Good Morning Britain earlier today, Frankie revealed she is beginning to feel the nerves ahead of the Strictly final - despite bagging herself high scores from the judging panel throughout the competition.
"There's a lot going through my head right now," she told former Strictly contestant Susanna Reid. "I'm trying to remember things I did weeks ago, learn something new…
"I'm excited to be in the final, but there's a lot of pressure. Everyone's expecting it to be perfect."
And, while her fancy footwork has been nothing short of spot on in the last few weeks, Frankie claimed she still feels "out of her comfort zone" when dancing live on air with her professional partner Kevin Clifton.
She added: "It's scary. I'm used to being with four other girls, so nine times out of ten you're thinking 'oh no one is looking at me if I mess up', but this you're really in the spotlight, it's live.
"I'm completely out of my comfort zone, I don't want to let anyone down watching, my friends and family, Kevin."
But, while she may be missing her bandmates by her side on stage, Frankie did reveal The Saturdays will all be there on Saturday to cheer her on.
Last weekend, Jake Wood was voted out of Strictly as Len Goodman used his deciding vote to save Mark Wright and his partner Karen Haeur.
Len's decision means Frankie's partner Kevin will be battling it out against his fiancée as he and Karen are set to wed.
But, rather than feel pressured by the competition, Kevin was delighted his wife-to-be and Mark made it through to the final four.
Following the result, Kevin was seen breaking down in tears. And, when quizzed about his emotional reaction, the professional dancer told Susanna he was just pleased as he thought they deserved to make it through.
He said: "[Karen and Mark] did such a beautiful dance – in my opinion the most beautiful dance so far on Strictly – so when it came to Len's decision to see who would make the final… they had worked so hard, I just completely fell apart."
Meanwhile, Mark said he was "extremely shocked" to be dancing in the final instead of Jake.
Convinced he would be the one to go after landing in the bottom two, the former TOWIE star said on the show: "I thought we were going home. This guy next to me has impressed everybody week after week."
The Strictly Come Dancing final begins this Saturday 20 December at 6.30pm on BBC One.
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