The duo — known as Heffron Drive — played the festival earlier this week.
“Had such a blast performing on the lovely island of #Ischia #Italy,” Kendall captioned on Instagram. “Felt great for the first time playing the new track!”
Just a few days later, Kendall shared a bit of his frustration with some paparazzi who are there for the festival, who were following him and girlfriend Micaela Von Turkovich.
“Well, just had my first argument with Paparazzi. I’m happy to have photos taken of me but there is a line. I may just follow them now..” he wrote on Twitter. “Next time I’ll periscope you can all see them. Good thing about phones today is I can bother them too.”