If you had to press certain experts in the arts and humanities what the most complex form of performance art is, they would say ballet, hands down.
What art? Can you explain?
Ballet!  The art of dancing in time to music while choreographing each movement to a note in an orchestra.  It is so complex that it has a dictionary of it's own terminology.
Can you tell more about ballet?
Sure!  It's a form of art where dancers attempt to convey the story of a particular piece of music through motion and music.  They aren't able to speak or sing, so they must let their physical movements convey the story.
Wow I love such dance
has evolved in a number of distinct ways. See glossary of ballet.
A ballet, a work, consists of the choreography and music for a ballet production. Ballets are choreographed and performed by trained ballet dancers. Traditional classical ballets are usually performed with classical music accompaniment and use elaborate costumes and staging, whereas modern ballets, such as the neoclassical works of American choreographer George Balanchine, often are performed in simple costumes (e.g., leotards and tights) and without the use of elaborate sets or scenery.
Etymology.
believed that the human form is the greatest of all works of art, Rhee wondered what it would be like to add music to the choreographed body movements of Tae Kwon Do, similar to the way that music is used in Olympic skating, ballroom dancing, and gymnastic floor exercise routines. Rhee choreographed several dances in ballet style, based on Tae Kwon Do moves, and set them to classical music, including Beethoven's Fifth Symphony and the theme from Exodus. The result of Rhee's invention—martial arts ballet—became