Kevin Costner, Oprah Winfrey among stars expected at Whitney Houston's funeral

Whitney Houston's invitation-only funeral is turning into a star-studded affair.

Aretha Franklin and Stevie Wonder will sing at the private funeral on Saturday in what promises to be a very musical service.

Publicist Kristen Foster confirmed that invitations went out to Houston's ex-husband, Bobby Brown; her co-star in blockbuster "The Bodyguard," Kevin Costner; and Oprah Winfrey.

People magazine reports that Costner will attend and speak at the funeral.

Houston's longtime musical mentor, Clive Davis, will also speak at the funeral. The eulogy will be given by gospel singer and longtime family friend Marvin Winans.

Others who will be part of the program include Donnie McClurkin, Tyler Perry, Kim Burrell, Rickey Minor, Alicia Keys, Dionne Warwick and Cece Winans, Foster said.

The Queen of Soul was a close family friend and considered Houston her goddaughter; she said in an email Thursday that Houston used to call her "Aunt Ree."

Organizers were getting the New Hope Baptist Church in Newark ready Thursday for the funeral. Drums and speakers, which were to be part of the musical service, were in the aisles.

Fans without invitations will be kept far away. Newark police say streets will be shut down for six square blocks around the church.

The funeral will, however, be streamed live, and can be watched here at FoxNews.com, as well as other online outlets.

Meanwhile, in Los Angeles, a radio station pulled two popular talk radio hosts off the air for comments they made about Whitney Houston on Thursday.

KFI AM 640 suspended John Kobylt and Ken Chiampou for calling Houston a "crack ho."

Audio posted at UrbanInformer.com shows that the hosts of the "John and Ken Show" also said she was "cracked out for 20 years."

The station said in a statement Thursday that Kobylt and Chiampou were "suspended for making insensitive and inappropriate comments about the late Whitney Houston."

Kobylt said in a statement that he and Chiampou "used language that was inappropriate" and they "sincerely apologize" to their listeners and to Houston's family.

The hosts will return to the airwaves Feb. 27.

The Associated Press contributed to this report.