Bollywood dance is a difficult topic to discuss because it is hard to pin down. Its exact definition, geographical distribution, and stylistic characteristics are amorphous. However in spite of all of this, it is surprisingly recognisable.
Let us begin by discussing the term "Bollywood". In the strict sense the term "Bollywood" refers to the Hindi culture, art, and film industry from Bombay. The other film centres of South Asia are often referred to by their own designations (e.g., Lollywood (Lahore), Tollywood (Andhra Pradesh)). However since the Bombay Hindi film industry dwarfs the other productions centres, the term "Bollywood" is generally extended to mean the entire South Asian film culture. For the purpose of this web-page, we will use the more general meaning.
The international appeal of Bollywood dancing is something that has been many decades in the making. Originally it was found only in places that had a significant consumption of Indian films (i.e., Former Soviet Union, and the Middle East). But a few years ago it started to become chic in Europe, and today it is rising in popularity in the US, and Canada.