Yoplus and 1942: A love story

In a recent Yoplus Yoplait advertisement (the girl seems to be doing yoga or something) that I have been seeing on TV, the background music is the same as the one from the song “Ek Ladki ko Dekha” from the Bollywood movie: 1942 – A love story.

If you play the song at http://www.youtube.com/watch?v=y88juKO48ZU, this is the part around 1:24; it is also repeated several times in the movie itself.

The URL for the ad is http://www.youtube.com/watch?v=lm_D8yitOMM (the tune that I am talking of is prominent at 11 s)

I wonder if it is a case of RD Burman lifting that part from some other tune, or Yoplait taking it from 1942!