Karen and Mark's Argentine Tango. It gave me goose bumps and made me cry. I was desperate for him to win. It is the only occasion when I really, really cared and voted copiously.
They had never scored a 10 and Karen at that stage had never done an AT before.
The dance was a winner (excellent 'alternative' track, well choreographed, recognisably an AT, understated, great outfits - they ticked all the boxes) and I was certain then they had it in the bag and then Karen's reaction. Blimey I am getting misty eyed just thinking about it.