Countdown was the most popular music program in Australian TV history. It was broadcast nationwide on Australia's government-owned broadcaster, the ABC and commanded a huge and loyal audience. It soon exerted a strong influence on radio programmers because of its audience and the amount of Australian content it featured. For most of the time it was on air, it also gained double exposure throughout the country by screening a new episode each Sunday evening, and then repeating it the following Saturday evening. The majority of performances on the show were Lip Synched.
(extract from Wikipedia 2011)
