Singer Alesha Dixon is the bookmakers' favourite to win BBC One's ballroom show Strictly Come Dancing.
Dixon and Di Angelo have become good friends during the show
She is tipped 1/3, ahead of actor Matt Di Angelo on 9/4. Each is performing five dances with a professional partner in the series finale.
Dixon, 29, admitted she was "scared and excited" by the dance-off, adding that she had been practising for hours every day to perfect her routines.
Di Angelo, 20, said he had been working on his nerves and hoped to "enjoy it".
The actor, better known as Deano Wicks in EastEnders, has been using various techniques to keep his nerves under control.
"I've tried a number of things," he said. "I picture walking along a beach when I'm walking out from behind the curtain.
"Sounds stupid, but it worked last week fine."
Both competitors admitted that dancing had consumed their lives during the show's 12-week run.
Dixon is paired with professional dancer Matthew Cutler
"By the way, dancers are not human beings," joked Dixon, who used to sing and rap in girl group Mis-teeq.
"How can you be human and do what they do?"
However, the dancing duo have become great friends and confessed they would find it hard to face each other in the final.
"When you're competing against somebody, it would make it easier if you didn't like them," said Dixon.
"It would make my life easier if I didn't like him [Di Angelo]. It would make me more competitive."
Normally, three celebrities take part in the final round of the reality show. There will only be two this year after actress Kelly Brook pulled out due to the death of her father.
Karen Hardy, who won last year's show with her dance partner, the cricketer Mark Ramprakash, told the BBC both competitors were strong contenders
She said: "Alesha is dynamic, gorgeous, powerful and put on a hundred great numbers. She is right at the top there.
"Matt - he is the young boy, unsung, but he is appealing to all those young beautiful people out there.
"Who is going to win? I'm going to say Matt - that could be Matt Di Angelo or it could be Matt Cutler. I can't tell you. I can't decide."
The results will be revealed at the end of the final show which began at 2125 GMT.