Dance is an integral part of K-pop. When combining multiple singers, the singers often switch their positions while singing and dancing by making prompt movements in synchrony, a strategy called "formation changing" (). The K-pop choreography () often includes the so-called "point dance" (), referring to a dance made up of hooking and repetitive movements within the choreography that matches the characteristics of the lyrics of the song. Super Junior's "Sorry Sorry" and Brown Eyed Girls' "Abracadabra" are examples of songs with notable "point" choreography. To choreograph a dance for a song requires the writers to take the tempo into account. According to Ellen Kim, a Los Angeles dancer and choreographer, a fan's ability to do the same steps must also be considered. Consequently, K-pop choreographers have to simplify movements.