What are the Indian dance types commonly seen in Bollywood movies?

Kaoru Trieu: What are the Indian dance types commonly seen in Bollywood movies?
What are the names of some of these dances? Are they referred to as “Bollywood dance” in general?

Answers and Views:

Answer by I Punjabi
Bollywood dance is the dance-form used in the Indian films. It is a mixture of numerous styles. These styles include belly-dancing, kathak, Indian folk, Western popular, and “modern”, jazz, and even Western erotic dancing.

Answer by Asutosh
Most of the dances are mixture of western and eastern styles.

Answer by Jumping Sun
These dances are the mixture of Indian folk dances and western dances and has got their own distinct identity which is known as Bollywood dance form.