Last night was Jack Antonoff's big charity show in NYC!
Fans at the show got to see Jack perform along with some other special guests!
Once of those guests was Lorde who did a few songs along with Jack on piano.
The performance seemed to be going well until, at the end of one of the songs, Lorde remarked on how nice the crowd was. It was then that an audience member heckled Lorde by saying Israel is nice too, in reference to the show she canceled.
Of course Jack came to her rescue shutting down the audience member with a few "colorful words"
Take a look at the incident below. Yes, it does contain some strong language.