(CNN) -- The list of those on the program for superstar pop singer Whitney Houston's funeral covers the spectrum of the entertainment world. Actor Kevin Costner, who starred with Houston in the 1992 hit movie "The Bodyguard," will speak at the service on Saturday, according to a source with knowledge of the funeral plans. Gospel singer Kim Burrell told CNN's Jason Carroll she will sing, "I Believe in You and Me," a selection made by the Houston family. The song was included in the soundtrack from "The Preacher's Wife," a 1996 film starring Houston. The ceremony also will feature performances by Stevie Wonder, Alicia Keys and Aretha Franklin, who is Houston's godmother. Singer Roberta Flack will attend, but it was unclear whether she would perform.
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Alicia Keys will sing at the funeral Saturday
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Tyler Perry also on the program
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Death certificate says burial will be at cemetery in Westfield, New Jersey
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Funeral will be available for TV, web streaming
But if @placeholder could not sing, the Houston family would love her."