Nine days after Zach Sobiech's death, the Stillwater High School teen's song "Clouds" continues to the soar on several music charts nationwide.
Sobiech died May 20 from osteosarcoma, a rare form of bone cancer. He just turned 18 on May 3.
Sobiech penned and performed "Clouds" last as a farewell to loved ones after learning his cancer was terminal, and the video of which went viral.
Taking cue from a line in "Clouds" -- "Up, Up, Up" -- is also rising on other Billboard charts, including a debut at No. 26 on the Hot 100 Singles chart. The EP that includes the single is No. 20 on the Top 200 album chart, and No. 1 on the Folk Album chart.
Billboard called the entry in the Hot 100 "one of the most bittersweet debuts in the chart's history."
Scott Herold, the founder of Rock the Cause -- the St. Paul-based nonprofit acting as Sobiech's label -- told the Star Tribune that the "past few days have been very sad, exhausting and on the level of the fantastic all at once."
Proceeds from sales of "Clouds" and Sobiech's EP will be going to the Children's Cancer Research Fund in Sobiech’s name.
According to the Star Tribune, more than $100,000 was already raised between December and last week. They noted that a higher percentage of sales will benefit the fund because of the project’s nonprofit status.
See the video for "Clouds" below. The song to date has more than 6.4 million views on YouTube.