It happened in 1962, when Pete Best took part in an early version of "Love Me Do" with the Beatles. It was the group's first ever session at what is now Abbey Road Studios. But after Ringo joined the group, the demo was considered subpar and ordered destroyed. But it wasn't, and all these years later, it's sparked a huge legal battle over the now historically rare recording.

The question for the court: who really owns it? The answer could be worth a lot of money. The demo is valued at around $6 million. 

Court battle set over demo of The Beatles performing at Abbey Road