I am not sure if this is posted here before,but I found something and I wish to share it with all of you guys.. Here's an excerpt from Danny Boyle's interview:
Which part of the film do you like the most? The music. The composer for the music A.R. Rahman is a superstar. He did the music, and he is phenomenal. You tend to get very bored with a film when you see so much of it, so the music keeps it going.Also, there is a scene in the film, when he is already a millionaire, and he is driving to the studio and is stuck in traffic. Someone bangs on his window, and you think she is a beggar, but she isn't. She just wants to wish him good luck. And that sums up the city for me. It just exceeds all your expectations. Source: http://www.livemint.com/2008/09/26234158/8216I-think-i-changed-worki.html?h=B

