ABC has released the new cast list for their hit show Dancing With the Stars. The contestants were announced on Monday’s “Good Morning America” by “Dancing” host Tom Bergeron.

He also unveiled a new competitive twist.

“In the middle of our season, over three weeks, we’re going to have double eliminations,” said Bergeron. “We’ll lose about half of our cast within that period. It will be a ballroom bloodbath.”

Samantha Harris returns as co-host, with the panel of judges including ballroom judge Len Goodman and dancer-choreographers Bruno Tonioli and Carrie Ann Inaba.

The ninth season of the hit ABC show premieres Sept. 21.

Filling out the celebrity cast:

•Aaron Carter, 21, singer, actor, reality show star

•Macy Gray, Grammy-winning singer, actress

•Ashley Hamilton, 34, actor, son of former DWTS competitor George Hamilton

•Melissa Joan Hart, 33, actress (Sabrina the Teenage Witch)

•Debi Mazar, 45, the mouthy publicity agent Shauna on HBO’s Entourage.

•Kelly Osbourne, 24, actress, reality show star

•Tom DeLay, 62, Former Republican Majority Leader

•Donny Osmond, 51, entertainer

•Joanna Krupa, 30, model

•Kathy Ireland, 46, model

•Mark Dacascos, 45, “the Chairman” on Food Network’s “Iron Chef America”

•Chuck Liddell, 39, mixed martial artist

•Louie Vito, 21, professional snowboarder

•Natalie Coughlin, Olympic swimmer

•Michael Irvin, 43, former Dallas Cowboys wide receiver

•Mya, 30, singer

Pop singer Aaron Carter was arrested for investigation of marijuana possession Thursday after he was pulled over for speeding in Texas, authorities said.

Carter, 20, the younger brother of Nick Carter from the Backstreet Boys, was in jail in Junction, Texas, awaiting a Friday morning appearance before a magistrate, Kimble County Sheriff Mike Chapman reports.

Carter’s Cadillac Escalade was pulled over for speeding in Junction at about noon on Thursday, said Chapman.

Officers found marijuana in the car, the sheriff said. There was nobody else in the car.

Carter spent the night in jail and is due in court this morning for his arraignment.

Aren’t you surprised it took this long for him to get busted?