~Kya Kuch Paya Humne....sab kuch kho gaya!=DMG

I was watching Star Utsav episode yesterday and was really curious to know one thing.

It was the scene when Armaan drops Riddhima home and during the journey switches on the radio. A song plays "Kya kuch paaya humne....sab kuch kho gaya..."

I fell in love with this song....have been humming it since then!Can anyone tell, which song it is?