The halftime show at Super Bowl XXXVIII, which was broadcast live on February 1, 2004 from Houston, Texas on the CBS television network, is notable for a moment in which Janet Jackson’s breast—adorned with a nipple shield—was exposed by Justin Timberlake to the viewing public for approximately half a second. The incident, sometimes referred to as Nipplegate, led to an immediate crackdown …

https://en.wikipedia.org/wiki/Super_Bowl_XXXVIII_halftime_show_controversy