ET caught up with the Australian singer on the red carpet at the iHeartRadio Music Awards in Los Angeles, California, on Sunday night, where he opened up about seeing Hadid in the press with her new love, One Direction alum Zayn Malik.
"It's just kind of the natural way things go. You're going to expect that kind of stuff," the "La Da Dee" singer said. "I've kind of been going a different way, taking a little time for myself just hanging out and keeping it low key, and working on my music.
"But I'm always very happy for her and her career and that type of stuff," he added. "I know how hard she's always worked to kind of get to the point in the modeling industry that she's at now, and I couldn't be more proud of her. We still talk every now and then. It’s nice."
The 19-year-old artist also talked about his recent Twitter rand following the bombings in Brussels.
"I just woke up and I was like, I shed a little tear in bed and everything," Simpson said. "It was strange, it was just a little shocking, you know? All those types of tragedies have been happening around the world these days."
WHAT HAVE THEY DONE TO THE EARTH. CAN EVERYONE TO LEARN LIVE PEACEFULLY WITH ONE ANOTHER?!— Cody Simpson (@CodySimpson) March 22, 2016
THIS WORLD IS RUN BY MONEY, GREED, HATRED AND COMPETITION. I CANNOT TAKE ANYMORE OF THIS DEATH AND WAR.— Cody Simpson (@CodySimpson) March 22, 2016
WE ARE SEGREGATED BY BORDER LINES AND BELIEF SYSTEMS. WE ARE NOT OUR COUNTRIES, WE ARE NOT OUR RELIGIONS. WE ARE ONE PEOPLE.— Cody Simpson (@CodySimpson) March 22, 2016
CAN EVERYONE LEARN LOVE. CAN EVERYONE LEARN PEACE. CAN EVERYONE LEARN UNITY. IM CRYING FOR THE WORLD.— Cody Simpson (@CodySimpson) March 22, 2016
My deepest thoughts and prayers go out to the people of Brussels.— Cody Simpson (@CodySimpson) March 22, 2016
The terrorist attacks wound up serving as the inspiration for a new song. "It's called 'I'd Rather Die'," Simpson shared, explaining that it's not that he'd actually rather die, but more his way of expressing his desire for everyone to live freely and without the "overhanging fear of war."
Simpson has been working on even more new material, much of it influenced by the process of growing up."I'm writing a lot about the development of a growing man," he said. "Developing your own sort of personal philosophies, ideologies, perspective on the world and everything -- just kind of really trying to sort of understand myself. And I think the best kind of works and lyrical content come from your most solitary moments."
Sounds like there's a lot of good stuff in the pipeline!