Bruce Springsteen and the theme of The Magnificent Seven last summer in Gothenburg. Each E Street Band member arriving to increasing cheers before Bruce appeared from beneath the stage to a rapturous cheer from the crowd.
I saw Coldplay this year and they used Maria Callas' O Mio Babbino Caro which was just lovely.
https://www.youtube.com/watch?v=s6bSrGbak1g