Oscar-winning composer AR Rahman has been busy with The Wonderment Tour – Global Premiere. Recently, he performed at Navi Mumbai’s DY Patil Sports Stadium with a sea of fans in attendance. While the crowd was grooving to his songs, a special guest made a surprise appearance. Yes, you guessed it right, it was none other than Dhanush. The actor surprised everyone by joining AR Rahman on stage. Not only that, Dhanush also performed and sang his hit Tamil song Adangaatha Asuran from Raayan. Now, several videos of their performance are going viral across social media platforms. While this appearance came as a surprise, the crowd felt it was worth every penny. Take a look at the viral videos here: The song was composed by AR Rahman, with vocals by both the music maestro and Dhanush. Meanwhile, the lyrics were penned by the actor himself.  When Dhanush joined AR Rahman on stage, he expressed his admiration for the composer. He called his work unbelievable and praised him repeatedly. In response, the musician thanked the Kuberaa actor …