Humming Urban Stereo's popular guest singer has passed away.

Lee Jin-hwa, who featured on some of Humming Urban Stereo's most popular songs, died of a heart disease on March 22nd. Lee Ji-rin who makes up the one-man band Humming Urban Stereo announced the news through his twitter on March 23rd. He wrote, "The heroine of Humming Urban Stereo who sang "Hawaiian Couple" and "Insomnia", a younger sister I loved so much, the Humming Girl (Lee Jin-hwa) has passed away on March 22nd. I ask of all of you to pray so that she won't be lonely on her way to the heavens."

He followed that with another tweet that same day at about 1:30 PM, "The cause of the Humming Girl's funeral is a heart disease. I'm sorry that I can't receive all the outside contacts, but I think her parent's requests are most important."

He then provided Lee Jin-hwa's funeral information, stating the venue (Suji St. Mary's Hospital in Gyeonggi Province) and the time (Saturday, March 24th at 11 AM).