If you were at Bruce Springsteen's gig at Croke Park on Sunday night, you'll be aware that none other than Bono joined him on stage at one point.
The U2 frontman and The Boss teamed up for 'Because the Night', a song made famous by Patti Smith and originally written by Springsteen.
It's not the first time they've sung it together, either - in 2010, the three musicians performed the song at the Rock 'n' Roll Hall of Fame's 25th anniversary concert.
However, (decent) footage from the other night has made its way online, and you can watch it below:
