Halftime shows are a tradition during American football games at all levels of competition. Entertainment during the Super Bowl, the annual championship game of the National Football League (NFL), represents a fundamental link to pop culture, which helps broaden the television audience and nationwide interest. Prior to the early 1990s, the halftime show featured university marching bands (the Grambling State University Marching Band has performed at the most Super Bowl halftime shows, featuring in six shows including at least one per decade from the 1960s to 1990), drill teams, and other performance ensembles such as Up with People. In the 90s, the halftime show began to feature major hit musicians, beginning with Super Bowl XXV (1991) with New Kids on the Block. In an effort to boost the prominence of the halftime show to increase viewer interest, Super Bowl XXVII (1993) featured a headlining performance by Michael Jackson. Background During most of the Super Bowl's first decade, the halftime show featured a college marching band. The show's second decade featured a more varied show, often featuring drill teams and other performance ensembles; the group Up with People produced and starred in four of the performances. The middle of the third decade, in an effort to counter other networks' efforts to counterprogram the game, saw the introduction of popular music acts such as New Kids on the Block, Gloria Estefan, Michael Jackson, Clint Black, Patti LaBelle, and Tony Bennett. Starting with Super Bowl XXXII, commercial sponsors presented the halftime show; within five years, the tradition of having a theme—begun with Super Bowl III—ended, replaced by major music productions by arena rock bands and other high-profile acts. In the six years immediately following an incident at Super Bowl XXXVIII where Justin Timberlake exposed one of Janet Jackson's breasts in an alleged "wardrobe malfunction", all of the halftime shows consisted of a performance by one artist or group, with the musicians in that era primarily being rock artists from the 1960s, 1970s and 1980s. These shows were considered "family friendly" and the time in which they took place has been described as "the age of reactionary halftime shows". Since Super Bowl XLV, the halftime show has returned to featuring popular contemporary musicians, with the typical format featuring a single headline artist collaborating with a small number of guest acts. The NFL does not pay the halftime show performers an appearance fee, though it