Mariah Carey [ tickets ], Destiny's Child [ tickets ], Usher [ tickets ] and O-Town have joined the roster of artists who will perform at the Oct. 21 United We Stand concert at RFK Stadium in Washington D.C., Launch.com reported.

Artists already on board include Aerosmith, Michael Jackson, 'NSync, Backstreet Boys, James Brown, Al Green, Ricky Martin and KISS, Rod Stewart, Sean "P. Diddy" Combs, Goo Goo Dolls and Train.

Creed [ tickets ] has postponed its inaugural Creedfest, set to take place in Orlando, Fla., Sonicnet reported. The event has not been rescheduled yet.

At a Bob Dylan tour stop in Jackson County, Ore., on Tuesday (10/9), security guards prevented Dylan from passing through a checkpoint because he didn't have his pass, the Associated Press reported.

Dylan and his security director reportedly demanded that the guards be thrown out, but the venue manager said that he only "relocated" them.

Ming & FS have canceled their tour "due to unforeseen personal circumstances," according to the band's publicist.

According to HitsDailyDouble.com, "EMI Recorded Music Worldwide Chairman/CEO Ken Berry has left the company and will be replaced by former PolyGram President/CEO Alain Levy."