It's stored away in singer Heather Baron-Gracie's iTunes
The event was set to take place in November.
'Sex', 'Somebody Else' and 'Robbers' were included in the show
Heather Baron-Gracie shared the demo snippet with fans on Twitter
Performers will take on classic '75 songs
"Hopefully we can all be together to celebrate defeating this terrible virus"
Pale Waves will headline the one-day event later this year
The band were involved in a bus crash while travelling to Berlin last week.
The band have confirmed that no-one was seriously hurt in the crash
The follow-up to 'My Mind Makes Noises' is in the works.