Remember Mohammad Irfan? The soulful singer from <a href=http://www.tellychakkar.com/news/ravi-wins-voice-india-2>Voice of India</a>? The soft-spoken singer is wearing a smile these days. Why? His song <em>Behne de</em>, which he sang along with Karthik for Mani Ratnam's <em>Ravaan</em> has become a chartbuster and that is no mean achievement.