APeace stunned the K-pop landscape with 21 members when it debuted with the song "Loverboy" in 2010. The choreography for the song uses the group’s large numbers to simultaneously create the illusion of clones and segmentation of the larger group with smaller configurations.
The styling, setting and choreography of the video underscore the group rather than individual members of the group. Styling the members in identical outfits (black pants, white jackets with a black insignia, black ties and white shirts) and placing them against a plain white backdrop highlights uniformity in the group and contributes to the impact of their large numbers. The video begins with just five members performing the core choreography, but at :30, the other members of the group march in, and the first five members seamlessly fall into line. The two lines of members converge in a 'V' formation at the center of the frame. Here, they engage in very precise, almost militaristic movements. Their number and position give the illusion of a special effect that multiplies one member, when in fact it is the actual 21 members of the group. Unlike other K-pop choreography, this dance routine does not use dance to isolate the lead vocalist: the emphasis is on the group.
At the same time, the choreography also breaks up the 21 members into various configurations, resulting in visual variety. The initial uniformity is broken up when alternating sides of the 'V' formation drop to the floor. The members change formation to enact one of the recurring dance phrases in the choreography, which includes drawing a heart in the air. This new formation is scattered in offset rows that are also in a 'V' formation, thus creating visual interest. The camera slowly pans up and down to expose as many members as possible, as opposed to remaining static as before. At 1:36, half of the group performs a series of freeze movements that echo the break in the beat, then the other half of the group does a similar move. The group then divides into three smaller groups, which alternatively perform dance moves while the two other groups remain still.
The "Loverboy" choreography combines precise, synchronized moves and large numbers for maximum effect.