that thing live musicians do where they let the crowd sing the chorus

Nice post from Regina Spektor of an audience singing "Fidelity" at a concert this weekend.

(the music on that ^^ plays on my phone but not on my browser, for some copyright-y reason)

Posted from a friend about the Tinariwen show:

There were goofy hippy dancers, dressed-up Tuareg dancers who hollered at the top of their lungs, and there was a solid line of people making videos with their shiny-screened I-phones right in front of me throughout the show. One of them also had a whistle, having apparently confused the concert with a soccer game. So there was ample opportunity to be distracted by the hell of other people, but I did my best to practice tolerance... except for when I told the guy with the whistle, "you know, that's really loud."

fwiw, I didn't notice or hear the whistle, but still.

On the live version of James' Sit Down from the early 90s, there was someone incessantly blowing a whistle while the crowd sang the chorus ad infinitum. Also a guy with an airhorn. Or maybe it was the same guy with both noisemakers.

https://www.youtube.com/watch?v=lv2yYKiB8lQ