I was thinking aloud about this song for sometime and realized "whats the real great deal even if it is not shot in NYC".. In the movie, Jo starts reading Surya's diary and all she sees is the lyrics.. She hasnt visited NYC, so she could only imagine some Western city. Since tamil movie songs have been mostly shot in Europe, she would have imagined something similar to what she had seen. And, she has seen Surya dancing only at home, so his dancing in the song isnt great. He is always happy; she hasn't seen him at any emotional moment probably.. so thats why his expressions suck in the song.
Lastly, the relationship b/w the two was at its lowest just before she read that diary, so the chemistry b/w them was in the song too.. Moreover, I think it had a director's touch as well.. Lemme explain.. By showing some other city in place of NY, the director probably gives us a hint of what is coming. Those who have watched the movie know how bad her imagination is (her imagination/dreaming of the interaction between Surya and Bhumika in the climax). One more thing... Jo is seen shown as doing some job.. may be it had something to do with preparing powerpoint presentations.. Thats why this song also runs more as a PPP.. (Thanks, KK, for helping me choose the 'right' word). Good direction, no? OK folks.. take it easy.. Enjoy the song.