The Coldplay frontman paid tribute to the iconic Wham! singer by performing "Last Christmas" at a Crisis center in London.
Martin was joined by another man named Kevin who sang the hit holiday song while he harmonized and played guitar.
"A huge thank you to Coldplay's Chris Martin for dropping by our Crisis at Christmas centers and entertaining our guests," the shelter wrote on it's Facebook page alongside a video of the performance. "Here he is performing a wonderful tribute to George Michael with our very own King of Karaoke - #CrisisXmas guest Kevin!"
Martin was also on hand to make tea and coffee for the shelter's residents alongside his girlfriend, Annabelle Wallis, days after he was spotted visiting a homeless shelter in New York Us Weekly reported.
"That moment when Coldplay's Chris Martin drops into the Crisis at Christmas shelter, with no fuss, no fanfare and no press, to help make tea and coffee and also play guitar so guests can have a sing song," a volunteer named Matthew wrote on Instagram alongside a selfie with Martin.
Michael died inside his London-area home on Christmas Day at 53.