Following Oliver Tree‘s death, the music industry is paying tribute to the artist, who died in a helicopter crash on Sunday.

Melanie Martinez, who previously dated the Love You Madly Hate You Badly artist, remembered him as a “true artist” with a “soft heart” in a tribute she posted Sunday to her Instagram Story.

“Been an absolute wreck today,” she wrote. “It’s really hard to understand how someone who you once shared such a specific and formative time of your life with can all of a sudden be gone. He was so dedicated to his art which I admired and respected so deeply. I think everyone who knew him will look back at those moments of laughter and joy he so easily sparked. His laugh was so contagious and warm. His ability to lead creatively and take action while also maintaining a sense of childlike wonder and awe was so inspiring. He had such a soft heart and was a true artist in every way.”