A video featuring Memphis QB Jacob Karam and a young cancer patient at St. Jude Children’s Research Hospital has been making the rounds on social media.

Karam stopped by the hospital to help with a scavenger hunt and played some music with 11-year old Breanna Bercegeay, who was diagnosed with acute myeloid leukemia on June 4. The two instantly became best friends.

“This little girl came up to me,” Karam told CBSSports.com, “and somebody said she wanted to sing. She was very shy, I could tell, and she had the mask on. I asked, ‘What’s your favorite song?’ She said Price Tag. I didn’t know how it was going to go, but she started belting it out. I tried to figure it out on the key, started backing her up a little. She sang her heart out, and it sounded beautiful.”

The video features Karam playing the piano while Breanna sings Jesse J’s hit “Price Tag”. It was posted online by Breanna’s mother Dara Bertucci on Monday, and has since been shared more than 1,000 times. Breanna’s mother had no idea who Karam even was. According to her, he never mentioned anything about being a football player, but invited them to a game at the end of their visit.

“He didn’t tell us any of that,” Bertucci said. “I think that’s what touches me most about the whole night. He wasn’t there for himself. He was there for us. He was there for Bree.”

Karam played by ear and Breanna sang about 10 to 15 other songs during their visit, before her mother made her leave to go eat dinner.  Breanna loves music, but she has always been too shy to even use her karaoke machine in front of other people at home.

Karam has visited several children at the Target House, a long term living facility provided to patients and families of St. Jude Children’s Research Hospital.