In my honest opinion, it would be quite a stretch to call most (not all) of Nepali and Indian artists artists.  They are no artists.  Some(again not all) have name recognition within certain circles, so they are more of a product.  But artists?  Puh-lease! 

Even the supposed king of Bollywood, Shah Rukh Khan, would be hard pressed to be referred to as an artist.  His acting is so single dimensional, he is the same in almost every freakin' movie.  But he has name recognition, so he is a product that advertising firms use. 

Now to talk about Kollywood folks... they just follow Bollywood.