After Justin Timberlake tore away part of Janet Jackson's costume at the 2004 Super Bowl, revealing a sunburst nipple shield, TiVos across America went into overdrive and the Federal Communications Commission quickly called it a "classless, crass and deplorable stunt." CBS made on-air apologies a condition for the halftime performers to appear on the Grammys. Timberlake said okay; Jackson didn't. The peekaboo show's fallout? An FCC probe and hypervigilant TV censors.