However, Sally believes he still has not fully overcome his nerves.
During the series, his partnership with pro-dancer Dianne has blossomed, and their chemistry on the dancefloor has been clear to everyone watching, Sally added.
“It’s special to be able to almost touch their bond through the screen,” said Sally.
“They’re very connected and they have to be in order to get this level of standard from both of them.
“Being mentally bonded is the most important thing but obviously they have to be physically connected as well and they’re pulling that off.”
Chris’ appearance on the programme coincides with it being the first series audio-description is available for viewers.
The service lays a voice over the programme that describes what is taking place on the screen.
“I’ve never watched the programme because it was only music to me before, but now I can 100% take on everything they’re saying and doing,” said Sally.
The Strictly Come Dancing final is on BBC One at 18:00 GMT on Saturday December 14.
Audio description is available via the BBC iPlayer.