(AP) - Clapping hands and swaying to gospel hymns in the church where Whitney Houston's powerful voice once wowed her congregation, the biggest names in entertainment sang along with the choir to remember the pop superstar at her hometown funeral Saturday.

"We are here today, hearts broken but yet with God's strength we celebrate the life of Whitney Houston," the Rev. Joe A. Carter told the packed New Hope Baptist Church after the choir behind him sang "The Lord is My Shepherd."

Mourners including singer Jennifer Hudson and Houston's mother, gospel singer Cissy Houston, stood, swayed and clapped along in the aisles as gospel singers BeBe Winans and the Rev. Kim Burrell joined with pop stars like Alicia Keys in paying tribute to the 48-year-old pop superstar who first began singing in the Newark church.

"You wait for a voice like that for a lifetime," said music mogul Clive Davis, who shepherded Houston's career for decades.

Others were more mournful; singer Ray J., who spent time with Houston during her last days, broke down crying. His sister, singer Brandy, put her arm around him. Cissy Houston and Houston's daughter, 18-year-old Bobbi Kristina, clutched each other in the front of the row.

Actor Kevin Costner, her co-star in "The Bodyguard" that spawned her greatest hit, remembered a movie star who was uncertain of her own fame, who "still wondered, 'Am I good enough? Am I pretty enough? Will they like me?'"

"It was the burden that made her great and the part that caused her to stumble in the end," Costner said.

Stevie Wonder and Oprah Winfrey were among the biggest names gathered to mourn Houston, along with Hudson, Monica, Brandy and Jordin Sparks - representing a generation of big-voiced young singers who grew up emulating her. Houston's voice, a recording of "I Will Always Love You," was to close the funeral.

Houston's cousin Dionne Warwick presided over the funeral, introducing speakers and singers and offering short comments about Houston between them.

Houston's mother was helped by two people on either side of her as she walked in and sat with her granddaughter and other family to begin the service. Houston's ex-husband, Bobby Brown, briefly appeared at her funeral, walking to the casket, touching it and walking out. Security guards said Brown was upset that he would have to sit separately from the people he arrived with, and left. A Brown representative didn't immediately comment.

Mourners fell quiet as three police officers escorted Houston's casket, draped with white roses and purple lilies. White-robed choir members began to fill the pews on the podium. As the band played softly, the choir sang in a hushed voice, "Whitney, Whitney, Whitney."

Close family friend Aretha Franklin, whom Houston lovingly called "Aunt Ree," had been expected to sing at the service, but she was too ill to attend. Franklin said in an email to The Associated Press that she had been up most of the night with leg spasms and sent best wishes to the family. "May God bless and keep them all," she wrote.

The service marks one week after Houston, one of music's all-time biggest stars, was found dead in a Beverly Hills hotel in California. A cause of death has yet to be determined.