Smith is up against Denise Van Outen, Dani Harmer and Kimberley Walsh in this weekend's showdown for the Glitterball Trophy.
During an appearance on It Takes Two with pro partner Flavia Cacace, Smith confirmed that he is learning a Salsa, a Charleston and a showdance for Saturday night.
All four finalists must pick their favourite routine of the series, dance a routine picked by the judges and create a unique showdance with their pros.
The Salsa has been selected by the judges, Smith has picked to repeat the Charleston, and Cacace teased that they had some "very exciting" plans for the showdance, which will be performed to 'Rule the World'.
Smith claimed that Cacace has turned him "from a coal almost into a diamond" on the BBC One reality show and revealed that it is his "natural sporting instinct" that has kept him battling to stay on the show.
The Strictly final airs on Saturday, December 22 on BBC One.
Photo gallery - the Strictly semi-final: