The government on Wednesday rejected a second appeal by CBS to lift the $550,000 fine imposed on its stations for the Janet Jackson breast exposure during the 2004 Super Bowl.
The singer briefly exposed one breast during the halftime show in what she later called a "wardrobe malfunction."
The Federal Communications Commission rejected CBS's claim that the show was not indecent and said the violation was "willful."
The FCC in March rejected the network's appeal of the fine, but allowed CBS to ask for reconsideration of the ruling.
In its order, the FCC noted that the fine is less than one-quarter of the $2.3 million that CBS charged for a single 30-second advertisement aired during its broadcast of Super Bowl XXXVIII.