As usual, the PAP IBs love to twist the narrative to fit their agenda.
The crux of the issue was that the music festival had plenty of foreigners, and it was unbecoming of Lee Hsien Loong (and the vapid echo chambers after him) to blame Sinkies for the littering problem.
Besides, these happy, festive outdoor events usually have plenty of litter left behind... check out the aftermath of New Year countdown events in other countries.
If Lee Hsien Loong had nothing credible or substantial to add, he should jolly well shut his mouth. We do not like to hear the preaching of graciousness... especially from him, an ungracious politician.