During the final London stop of their ongoing tour behind Everything Now, Arcade Fire brought out Florence Welch. They played her Florence and the Machine hit, “Dog Days Are Over.” Afterwards, they introduced Boy George to the stage for Culture Club’s “Karma Chameleon.” Then, they all did “Wake Up” together. Below, see Florence’s tweets about the collab, and scroll down to see video of the performance.

At yesterday’s London show, Arcade Fire brought out Jarvis Cocker for “Cunts Are Still Running the World.” The night before, they covered the Pretenders’ “Don’t Get Me Wrong” with Chrissie Hynde. Florence and the Machine recently returned with a new track, “Sky Full of Song.”

Read “Arcade Fire’s Fashion Evolution” on the Pitch.