"Open Happiness" (開動快樂) is the seventh track and fourth plug (except 997) of Joey Yung's cantonese album, A Time For Us. It was plugged to radios on Joey's birthday in 2009. The song was also the TV commercial song of Coca-Cola. The song was adapted from "Open Happiness", the international main theme song of Coca-Cola.
Joey performed the identical album version of the song in all performances.