A-ha "Take on me"

This is probably one of the most well known music videos and is number 3 of the 100 greatest music videos.
When the song was first released it disappeared in the charts, it wasn't until the band decided to make a music video that the song became a real success.
The video uses rotoscoping, which is a type of animation where you draw over the film to create this matte, hand drawn effect, this was expensive but at the same time the effects were revolutionary. The video won 6 awards out of its 8 nominated.