After Eminem's (along with Lil Wayne, Drake and Travis Barker) performance at the 52nd Annual Grammy Awards was censored so much that nearly 35% of the song was "cut" leaving huge gaps of silence, CBS has stepped forward to answer why exactly they did that. According to the network, many terms are not allowed to be on air in a national television broadcast. "It was a rousing musical performance, but words were edited from the live telecast that didn't meet our broadcast standards," said CBS spokesman Chris Ender. "We have great respect for artists' creative freedom, but there are certain things you can't say, or sing, on television."
If you missed the ceremony, Lil Wayne and Eminem first performed "Drop The World" then later they were joined by Drake and Travis Barker to perform their "Forever" hit track. The main person who everyone noticed was the CBS bleep-machine which made the song nearly completely silent. Even though the CLEAN vocals of the song were played in the background and the rappers rapped over it (with multiple rehearsals so they did not curse), CBS still cut the hell out of it.
Eminem, Drake, Lil Wayne, Travis Barker – Grammy Awards Performance