Behne De, yup, that's the song, picturised on Ash and Abhishek. Wonderful lyrics. I think it's written for Ash because "Let me go free" as the lyrics translate suit with Ash's character, Ragini.
Here is the wonderful promo http://broadband.glamsham.com/raavan/behne-de-0100-min-video_03272fa4f.html Enjoy it!