Janem Saleem writes: "agh. jaan pehechaan ho is hands down, my least favorite film song of all time."
The name Janem Saleem suggests you are not from the west, not really someone who can appreciate rock music. "Jaan Pehechaan ho..." is rock with Mexican horns, etc. and is quite amazing! They didn't feature it in a major Hollywood movie for no good reason. It's terrific! But you probably don't have the cultural background to appreciate it.
I can't stand opera, most country music, bagpipes, polkas, etc. There's nothing wrong with any of it, it's just not my kind of music, so it's inappropriate for me to pass judgment on it. But when it comes to Rock music, I am an EXPERT! I listen to it, write it, sing it, play it, review it, etc.
"Jaan Pehechan Ho..." is a gem. That's why it's featured in a major Hollywood movie. That's why the movie video also has a separate clip of the song from "Gumnaam" with the brilliant choreography.