The flash of Jackson's breast is now being investigated by the FCC for television indecency. Michael Powell, the FCC chairman, has said that the whole performance crossed a "heinous line" and was nothing less than "onstage copulation" as America works itself into a lather over the incident.
Around 100m viewers saw Justin Timberlake pull back Jackson's top to reveal a nipple tassle and ignited a storm, with the incident garnering more headlines than George W Bush's anouncement of an investigation into weapons of mass destruction intelligence.
At first, Jackson claimed it was an accident but has since come clean and admitted that it was planned.
In a statement Jackson said: "The decision to change the Super Bowl performance was actually made after the final rehearsal. MTV, CBS, the NFL had no knowledge of this whatsoever and unfortunately the whole thing went wrong at the end. I am really sorry if I offended anyone, that was truly not my intention."
MTV wasted no time in blaming Jackson and its chief executive did not hold his fire.
MTV chief executive Tom Freston said: "Janet Jackson engineered it. There's now going to be an FCC investigation into the nipple."
Shocked as America might be this has not stopped Jackson and Timberlake from going ahead with their appearance at Sunday's Grammy awards ceremony, which is being aired on CBS.
However, the network, which also broadcast the Super Bowl, plans to delay slightly its live broadcast so it can edit out any unseemly footage.
"Janet is still scheduled to be a presenter and Justin is still scheduled to be a performer," said Ron Roecker, a spokesman for the National Academy of Recording Arts & Sciences, which will present the 46th annual Grammy Awards in Los Angeles.
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .