Considering the present situation in the serial, my choice of songs that should be played in the background are;
'tera mera rishta purana'-(Aawarapan) for Robby, "mera dil jis dil pe fida hai, woh bewafaa hai"-(Bewafaa's sad song) for Robby, he should sing this in a concert. My other choice is 'why did u break my heart, why did u fall in love?' (Akele Hum Akele Tum) for Robby. These are my three main choices for Robby.
In future, if Raunak and Kasturi ever fall in love, then my songs will be "Naa Naa karte pyaar, haai main kar gayee"-(Dhadkan), "pyaar tho hona hi tha"(Pyaar Tho Hona Hi Tha).