Around 5,000 people packed into Sefton Park in Liverpool on Sunday for the outdoor gig which included performances from Blossoms, The Lathums and Liverpool singer-songwriter Zuzu.
Pictures and videos showed people packed together, arms in the air, dancing to the music at the event which has been hailed as a milestone towards getting live events running again.
Everyone had to produce negative coronavirus tests to enter the event but did not have to wear face coverings or follow social distancing rules.
It is hoped that test events like this will pave the way for festivals and venues across the country to reopen for mass gatherings again.
After the event, headliners Blossoms tweeted: “That was unreal, we’re buzzin.”