MIAMI -

A 16-year-old Pompano Beach boy offered some much-needed musical therapy for the kids at Holtz Children's Hospital, a place he knows all too well.

Javaris Cox has a brain tumor, but it doesn't keep him from doing what he loves best, and that is to sing.

Javaris has been in and out of Holtz Children's Hospital and wanted to help ease the fears of other patients there just like him.

A teen with a dream of a singing professionally held a concert Friday for the medical staff that's helping treat the tumor in his brain.

"I don't use it as an excuse. I just keep on moving," said Javaris.

Javaris was diagnosed in 2010. The cancer had gone into remission for a few years, but in a routine checkup this past May, doctors found that the cancer had returned.

"I was under treatment and never let that bother me," said Javaris.

"He's been through a lot," said Javaris' grandmother, Bernice Harris. "Hard to concentrate."

Javaris is undergoing chemotherapy and may need a stem-cell transplant, but that hasn't stopped him from sharing his song.

"He asked me, 'Gramma, you think that I should do?' I said, 'It's in your heart. If you want to do it, you can do it,'" said Harris.

Javaris said he wants other kids in similar situations to feel encouraged by his concert to go after what they want.