NBC will air a repeat of last week's premiere of Last Comic Standing in place of Tuesday's scheduled World Music Awards. NBC has not issued an explanation for the last minute swap.
The awards taped Monday night in Monte Carlo, but reportedly there were issues because Mariah Carey showed up late for her album launch, which was scheduled to take place before the awards show, resulting in her showing up late for the awards and, allegedly "creating chaos". However, the award show did take place, complete with a performance by Mariah, and the source for this story is a British tabloid so it may not be 100 percent accurate.
According to Billboard, The World Music Awards canceled a planned livestream of its pre-show red carpet due to technical difficulties, so there may be a more mundane explanation for NBC's decision to pull its telecast of the show.
Mariah Carey will still be a part of NBC's line-up this week. Saturday at 8PM the network will air the special Mariah Carey: At Home In Concert With Matt Lauer.