In the aftermath of Janet Jackson's controversial Super Bowl breast exposure, MTV has decided that pop tart Britney Spears may be a bit too "Toxic" for daytime tastes.

The music channel, which produced Jackson's notorious halftime duet with Justin Timberlake, said Monday it has moved six of its racier videos, including Spears' video for her new single, "Toxic," from daytime to late-night rotation.

Record labels for Spears and other artists whose videos were consigned to overnight programming -- from 10 p.m. until 6 a.m. -- were informed of the move last week, a spokeswoman for the network said.

She denied that MTV was engaging in self-censorship or responding to pressure from its corporate parent, Viacom Inc.

"We always take into account what the cultural environment is on an ongoing basis," the spokeswoman said. "Given the particular sensitivity in the culture right now, we're erring on the side of caution for the immediate future."

A Viacom spokesman likewise insisted the decision to remove some particularly edgy videos from daytime rotation, as first reported in the Los Angeles Times, originated from within MTV.

"All play lists are decided by the individual channels and we have nothing whatsoever to do with it," Viacom spokesman Carl Folta said.

MTV's decision also applies to offerings from alternative rock bands Blink 182 and Maroon 5 and the rap-rock outfit Incubus, whose video for the song "Megalomaniac" depicts an Adolf Hitler character with angel's wings flying over a crowd.