background song????

hey guys....woh song jo rudra n his hubby kay peechay laga hoa tha on ......i don't know may be tue or mon's wali episode.....kaun si movie ka hai....????can any tell me .....i want that song !!!!!!plz tell me....song was picturized on d beach wen they both were enjoying.....does any one know ...about it...keh kaun si movie ka hai???do tell me plz😃