As the Super Bowl itself is typically the most-watched event on television in the United States annually, the halftime show has been equally-viewed in recent years: the halftime show of Super Bowl XLIX featuring Katy Perry was viewed by 118.5 million, as part of an overall telecast that peaked at 120.3 million at its conclusion—the most-watched television broadcast in U.S. history.
https://en.wikipedia.org/wiki/List_of_Super_Bowl_halftime_shows
Beginning in 1991, the halftime show began to feature pop music acts such as New Kids on the Block and Gloria Estefan. In an effort to boost the prominence of the halftime show to increase viewer interest, Super Bowl XXVII featured a headlining performance by Michael Jackson.
https://en.wikipedia.org/wiki/List_of_Super_Bowl_halftime_shows
The NFL claims that the Super Bowl LI halftime show, with Lady Gaga was the most-watched musical event of all-time, citing a figure of 150 million viewers based on the television audience, as well as unique viewership of video postings of the halftime show on the league's platforms, and social media interactions (a metric that was never calculated prior to 2017).
https://en.wikipedia.org/wiki/List_of_Super_Bowl_halftime_shows
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, represents a fundamental link to pop culture, which helps broaden the television audience and nationwide interest. As the Super Bowl itself is typically the most-watched event on television in the United States annually, the halftime show has been equally-viewed in recent years: the halftime show of Super Bo
https://en.wikipedia.org/wiki/List_of_Super_Bowl_halftime_shows
With Katy Perry, Beyonce, Coldplay, Bruno Mars, Lady Gaga, Madonna and the Black Eyed Peas as the past few performers, Super Bowl halftime sets have skewed toward the pop realm in recent years, largely out of necessity: the suitable classic rockers who were a hallmark of the halftime show for years (the Rolling Stones, U2, The Who, Bruce Springsteen, Tom Petty).
http://variety.com/2017/music/news/justin-timberlake-super-bowl-halftime-1202596199/
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.
https://en.wikipedia.org/wiki/List_of_Super_Bowl_halftime_shows
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.
https://en.wikipedia.org/wiki/List_of_Super_Bowl_halftime_shows
The NFL claims that the Super Bowl LI halftime show, with Lady Gaga was the most-watched musical event of all-time, citing a figure of 150 million viewers based on the television audience, as well as unique viewership of video postings of the halftime show on the league's platforms, and social media interactions.
https://en.wikipedia.org/wiki/List_of_Super_Bowl_halftime_shows
Prior to the early 1990s, the halftime show was based around a theme, and 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 the 1990s), drill teams, and other performance ensembles such as Up with People.
https://en.wikipedia.org/wiki/List_of_Super_Bowl_halftime_shows
It’s official. Justin Timberlake tweeted on Sunday afternoon that he will perform at the Super Bowl Halftime Show in 2018. The game is set for Sunday, Feb. 4 at Minneapolis’ U.S. Bank Stadium. Variety reported that he was the frontrunner on Sept. 27.
http://variety.com/2017/music/news/justin-timberlake-super-bowl-halftime-1202596199/
halftime show at the super bowl
At the Super Bowl, Halftime shows are a tradition during American football games at all levels of competition.  Halftime shows are a tradition during the Super Bowl.