sahiti's song in june 9 epi

Hye sorry to bug you guys, but i just wanted to know the name and movie of the song Sahiti sang for todays epi...its a beautiful song...sanjay mentioned how its a beautiful song and sonu also said how its one of his favorites and is composed by rajesh roshan. it goes something like "naa jaa tu hum se door..aur aa jaa...nindiya tu le chal kahin...door yahaan se door..."