The first song from Varun Dhawan-starrer Baby John is out. Titled Nain Matakka, the song was composed by Thaman S and sung by none other than Diljit Dosanjh and Dheekshitha Venkadeshan aka Dhee. While the music is enough to make you want to get up and dance, Varun Dhawan's moves and his chemistry with Keerthy Suresh make it even more …