Why global audience is getting attracted towards bollywood

The attraction for Hindi films may be due to various reasons internationaly.The main reasons are :
Song and Dance - Song and dance are the most important constituents of Hindi films.Which is liked by everybody outside India.
Costume - Costume and female leads like,Aishwarya recently Shilpa Shetty are crowd pullers.Shahrukh, Salman and Aamir Khan along with Hrithik Roshan are extremely popular the worldover.This brings in international audience even if they dont know hindi.
Drama and Story - Dramatisation and story have very important role to make hindi films popular.