Simplify the following text for a Grade 8 native English-speaking person.
Original: Classical ballet is the most methodical of the ballet styles ; it adheres to traditional ballet technique . There are variations relating to area of origin , such as Russian ballet , French ballet , Danish Bournonville ballet and Italian ballet , although most ballet of the last two centuries is ultimately founded on the teachings of Blasis .
Simplified: Ballet is always performed to music , and in many cases the music was specially composed for a particular ballet .