Martin, who nobody even knew was in India, surprised the room when he suddenly broke into song. According to Buzzfeed India, Martin gave an impromptu acoustic renditions of 'Vida la Vida," 'Fix You," and 'Paradise."

Even wilder, he wasn't the only celebrity in attendance. Slumdog Millionaire star Freida Pinto, who's been promoting her "Girl Rising" campaign in India over the past week, was also in the crowd. Plus, before Martin went on stage, he was introduced by comedy collective All India Bakchod. Indian musicians Dadlani Raghu Dixit were also in the room.

Martin's low-key performance, however, didn't stay a secret long. Soon after his name became a trending topic in India, thanks to all of the fans who found out about the show too late.