Aretha Franklin and Stevie Wonder will sing at Whitney Houston's private service today.
Publicist Kristen Foster also confirmed that invitations went out to Houston's ex-husband, Bobby Brown; her co-star in The Bodyguard, Kevin Costner, and Oprah Winfrey.
Houston's longtime musical mentor, Clive Davis, will speak at the funeral.
The eulogy will be given by gospel singer and longtime family friend Marvin Winans.
To keep away gawkers, police say streets will be shut down for six square blocks around the church.
The funeral service will be streamed live through the website livestream.com/aplive and will be available on some satellite services.
The funeral comes one week after Houston was found in her hotel bathroom. Officials are waiting for the results of toxicology tests that will help them ascertain how the 48-year-old died. Houston was one of the world's best-selling artists from the mid-1980s to the late 1990s, selling 170 million records worldwide.