Yash Raj Films have reportedly spent 5 crore rupees($1mn). Most of it on the shooting of the song of course. From the first look, the song is not only superb in Audio, the video of the song is really well, and that's the reason YRF thinks they'll be able to attract people to cinema halls in the name of this song, if nothing else.
Translation
Dum malang malang dum dum malang malang
Malang malang dum dum malang malang
Malang malang dum ishq ishq hai malang mera..
Completely mad, Unaware of the surroundings
Mad in every breath
I am deeply mad and crazy in love