Zach Sobiech lost his battle with cancer more than two years ago, but his words will flood the Mall of America Friday.
In a news release, the mall says they expect more than 5,000 people to gather in their rotunda to sing his inspirational song, "Clouds," a year after 7,200 people gathered to sing his song and raise money for cancer research.
Sobiech died in May 2013 at the age of 18. He battled osteosarcoma – a rare bone cancer – for four years.
According to Children's Cancer Research Fund, about 400 U.S. children are diagnosed with that form of cancer every year. The teenager wrote "Clouds" about his journey with the disease before he died.
MOA says the singers – referred to as "The Largest 'Clouds' Choir for a Cause" – will be made up of school choirs, church choirs, families and other groups. The performance will wrap up the KS95 for Kids Radiothon.
KS95 says the funds raised will benefit Children's Cancer Research Fund and Gillett Children's Specialty Healthcare. Last year, the station posted on Facebook that they raised more than $700,000.
The mall says the radiothon runs from 5:30 a.m. to 7 p.m. The "Clouds" sing-a-long will be at 7 p.m.