"A huge thank you to Coldplay's Chris Martin for dropping by our Crisis at Christmas centres and entertaining our guests!," read a post on Crisis' Facebook page, alongside a video of Martin's performance.
Michael, who was known for his avid involvement in charitable organizations, died of heart failure in his sleep on Sunday. He was 53.
Martin isn't the only singer to honor Michael through music. On Wednesday, the "Faith" singer's longtime friend, Elton John, opened his Las Vegas show with a performance of "Don't Let the Sun Go Down on Me," as a photo of Michael was projected in the background.