Shirley Ballas has revealed the care she took with filming the Strictly Come Dancing Christmas special despite a touch of post-op fatigue.
The ballroom dancer had surgery to remove a lump in October but was back in action with a bang during the 12-part series.
She described how she woke up an hour and a half before the opening show at London's BBC Studios in Salford, Greater Manchester, to a 'heart beating and an epidural on me'.
In a blog post on her official website, the 57-year-old, who admits she doesn't dance on the TV show, writes: 'At one point I was so annoyed with them, and as I walked through the door and onto set with the doctors and fixers I looked at them and said, "you all let me down".
'I knew something was seriously wrong. The mistake I made was not calling them before I went and I got no pain killers.
'For the first 45 minutes, I literally couldn't move my arms or legs.
'It was awful. I had to take almost every shot. My lead instructor, Simon had to carry me out for one segment with arm straps.
'After I did one better, I was pretty much in pain the rest of the day. I ended up on the sofa for the rest of the session. I suffered terribly in the week leading up to it. I thought to myself, "This really has to be the one I finish my year on with".'
Shirley posted this photo on her official blog as she reveals the care she took with filming the Strictly Come Dancing Christmas special
Shirley Ballas takes a bow at the end of the Strictly Come Dancing final at the O2 Arena, London, last month
The Strictly Come Dancing: An Act of Faith, Christmas Special begins on BBC1 on Wednesday night at 7.15pm.
The star, who won the show in 2013, reveals: 'I just don't have the energy for dancing at all any more.
'For some reason I have a series of insomnia where I find it difficult to fall asleep at night. It has been a month.
'I don't think I've danced in the last six weeks at all, and when I did something, I would end up in a bad way for two days.
'I blame it on the exhaustion.'