Cheerleader
From wipipedia.org

In some American sports, a cheerleader is one of a group of women who lead the cheering of the team's fans. Traditionally, they wear scanty uniforms (very short skirts, crop tops showing the midriff, cleavage) and perform athletic manoeuvres. Often, these manoeuvres are designed to allow spectators to glimpse their panties.
Because of their style of dress, cheerleaders are frequently an object of fetish.