kuch bole bin kahe suneThe music and the lyrics are as straightforward as it gets and like all great things, the simpler the song the better it sounds.
meri yaar hai zindagi
kuch bole bin jo sab kuch kahe
andaz hai zindagi
I tried finding it online at the usual places, without luck . And then Ved shared the ad for Vodafone's Star of the Match, which btw is the best ad of the new series they have.
That reminded me of the Passion Pro ad and I searched the ad again on YouTube, and got lucky - click away thanks to tendua04 for the upload)
You can download the ad from http://keepvid.com/