Swansea City players joined rock star Rod Stewart on stage at the Liberty Stadium later after their Championship play-off victory.
Swans manager Brendan Rogers said the football-loving singer had been in touch to congratulate the team on their win against Reading on Monday.
Stewart and the players showed the trophy from the stage on Wednesday night.
Swansea will be the first team from Wales to play in the Premier League.
On Tuesday evening thousands of fans turned out as the Swans toured the city on an open-top bus.
Rogers said he had told his players to savour the celebrations following the 4-2 triumph.
"You have to celebrate success," he said.
"I'm a Rod Stewart fan. It's going to be a fantastic experience for everyone."
The stadium concert is Stewart's only gig in Wales this year and follows his European tour.
The Swans moved to the purpose-built stadium they share with the Ospreys regional rugby side five years ago from their old Vetch ground.
Monday's win is estimated to be worth around £90m to the club and will see the likes of Manchester United, Chelsea and Liverpool play at the stadium next season.