Here's the rundown of every known version of the song:
1980/81 - Bridges - The Juicy Fruit Song This was merely a testing song, and is a more rock version of Take On Me with Norwegian lyrics. 1982 - Lesson One Much more synth-pop sounding, has similar lyrics but not there yet, 1983 - Instrumental Demo (Partially Found) Seems to be an early instrumental of the actual demo from the same year. 1983 - Take on Me (Demo) First appearance of the name, same lyrics. 1984 - First release Has different vocals and instruments, sold 300 copies worldwide, had the "blue" video, and got a-ha's first TV performance on NRK. 1985 - The final version The one we all know today with the famous MTV video.