The 27-year-old model, who came joint top of the leaderboard last weekend with her dance partner Aljaz Skorjanec, has admitted her body is 'failing' her as the big day looms.
Abbey will take part in the dance show's first ever all-female final alongside TV presenter Susanna Reid, actress Natalie Gumede and singer Sophie Ellis-Bextor.
Abbey said: "I do feel like that now I know the end is in sight, my body's failing on me. I've got to find that last bit of stamina and channel it into this dance.
"We spent about two hours on this one lift. I couldn't stay straight, I kept breaking in the middle, not using my core enough and Aljaz hurt his wrist.
"At one point he said he'd have to take it out, but it's such a spectacular move that's different so hopefully we get it right and he doesn't have to take it out."
Abbey with her dance partner Aljaz Skorjanec
The mum-of-one will perform her showdance - for which her partner Aljaz can choreograph any moves he wishes rather than being tied to a particular style - to the Guns N'Roses hit 'Sweet Child O' Mine'.
She went on: "Everything is really sharp moves and it's draining on your body. After three months of hours and hours of rehearsing, I'm finding it tough.
"The routine's epic, the song's epic. I've got to find that last little bit of strength. I'm excited, I want to do myself proud."
Abbey scored 39 out of 40 for both her dances last weekend to tie with 'Corrie' star Natalie Gumede at the top of the leader board. However the soap star wasn't such a hit with viewers who placed her in the bottom two, but she survived the dance-off against Patrick Robinson.
Abbey added: "I've got to work hard and get this showdance perfect. This is the difference between winning or losing."
Gumede, who is partnered by Artem Chigvintsev, will dance around a pole for her show dance to Fred Astaire's 'Stepping Out With My Baby' - but she said she hoped viewers did not get the wrong idea.
"Artem has choreographed some beautiful moves around the pole. I hope no one gets any ideas, as its about grace and flow it's really tricky but if I can get it right it will be great."
Series 1 / 2004 Winner: Natasha Kaplinsky Partner: Brendan Cole Also Starring: Jason Wood, David Dickinson, Verona Joseph, Claire Sweeney, Martin Offiah, Lesley Garrett, Christopher Parker
Series 2 / 2004 Winner: Jill Halfpenny Partner: Darren Bennett Also Starring: Quentin Wilson, Carol Vorderman, Esther Rantzen, Diarmuid Gavin, Sarah Manners, Roger Black, Aled Jones, Julian Clary, Denise Lewis
Series 3 / 2005 Winner: Darren Gough Partner: Lilia Kopylova Also Starring: Siobhan Hayes, Jaye Jacobs, Gloria Hunniford, Fiona Phillips, Dennis Taylor, Will Thorp, Bill Turnbull, Patsy Palmer, James Martin, Zoe Ball, Colin Jackson
Series 4 / 2006 Winner: Mark Ramprakash Partner: Karen Hardy Also Starring: Nicholas Owen, Jimmy Tarbuck, Mica Paris, DJ Spoony, Georgina Bouzova, Jan Ravens, Ray Fearon, Peter Schmeichel, Claire King, Carol Smillie, Louisa Lytton , Emma Bunton, Matt Dawson
Series 5 / 2007 Winner: Alesha Dixon Partner: Matthew Cutler Also Starring: Brian Capron, Stephanie Beacham, Willie Thorne, Gabby Logan, Dominic Littlewood, Penny Lancaster Stewart, Kate Garraway, John Barnes, Kelly Brook, Kenny Logan, Letitia Dean, Gethin Jones, Matt Di Angelo
Series 6 / 2008 Winner: Tom Chambers Partner: Camilla Dallerup Also Starring: Phil Daniels, Gillian Taylforth, Gary Rhodes, Jessie Wallace, Don Warrington, Mark Foster, Andrew Castle, Heather Small, Cherie Lunghi, John Sergeant, Jodie Kidd, Christine Bleakley, Austin Healey, Lisa Snowdon, Rachel Stevens
Series 7 / 2009 Winner: Chris Hollins Partner: Ola Jordan Also Starring: Martina Higgins, Richard Dunwoody, Rav Wilding, Lynda Bellingham, Joe Calzaghe, Jo Wood, Zoe Lucker, Craig Kelly, Phil Tufnell, Jade Johnson, Ricky Groves, Natalie Cassidy, Laila Rouass, Ali Bastian, Ricky Whittle
Series 8 / 2010 Winner: Kara Tointon Partner: Artem Chigvintsev Also Starring: Goldie, Paul Daniels, Peter Shilton, Tina O'Brien, Jimi Mistry, Michelle Williams, Felicity Kendal, Patsy Kensit, Ann Widdecombe, Gavin Henson, Scott Maslen, Pamela Stephenson, Matt Baker
Series 9 / 2011 Winner: Harry Judd Partner: Aliona Vilani Also Starring: Edwina Currie, Dan Lobb, Rory Bremner, Nancy Dell'Olio, Lulu, Audley Harrison, Russell Grant, Anita Dobson, Robbie Savage, Alex Jones, Holly Valance, Jason Donovan, Chelsee Healey
Series 10 / 2012 Winner: Louis Smith Partner: Flavia Cacace Also Starring: Johnny Ball, Jerry Hall, Sid Owen, Colin Salmon, Fern Britton, Richard Arnold, Victoria Pendleton, Michael Vaughan, Nicky Byrne, Lisa Riley, Dani Harmer, Denise van Outen, Kimberley Walsh