Zack Sharf Jack Black has gone viral on social media thanks to a clip of him serenading a young “School of Rock” fan diagnosed with a rare illness. The two met at the Layla Paige and Friends Walk for TrinityKids Care, which Black hosts each year to raise funds for child hospice programs in Southern California. A clip shared by Upworthy shows Black singing a “School of Rock” song to Abraham, a 15-year-old with a rare mitochondrial disease called Pearson syndrome. The video earned over 1.5 million views on Twitter in a single day. The TrinityKids Care fundraising event took place on Oct. 8. Abraham’s mother told Upworthy, “It’s almost been a week since the meet and Abraham is still talking about how he got to meet Jack.” Because her son is a big fan of “School of Rock,” she arranged a meeting with Black during the event.