The ad, created by Fallon, debuted on Channel 4 in January and continued the theme established by the brand's 'Gorilla' and 'Trucks' ads.
The spot opens with two young children posing for a portrait in a photography studio. When the photographer leaves them alone the boy starts playing Freestyle's 'Don't Stop the Rock' on his digital watch and the pair break into a choreographed eyebrow dance in time to the music.
The girl, who is wearing a dress in Cadbury's signature purple colour, then lets bursts of air out of a balloon to mimic the sound of a DJ scratching a record.
Lucy Evans, senior brand manager for Cadbury's Dairy Milk, said that the aim was to create an ad that people enjoyed watching as much as they enjoy eating chocolate.
"The idea just made us beam. We wanted to create entertainment that makes people smile," Evans said.
Nick Darken, creative director and partner at Albion and a member of the Thinkbox Academy, said: "'Eyebrows' is the one you'll remember this time next year."
'Eyebrows' was voted February's winner ahead of the Department for Transport's 'Live with it' ad , featuring a man coming to terms with killing a child on the road, and Lurpak's 'Saturday is breakfast day'.