Chasen was laid to rest at Hillside Memorial Park and Mortuary in Fox Hills.
Among the hundreds who came to pay their respects was longtime friend and Oscar-nominated singer-songwriter Carol Connors.
"It's such a tragedy because nobody can believe what really happened, but there were great moments of laughter when people told the most wonderful stories," Connors said.
Connors is best known for co-writing the theme for the movie "Rocky."
She knew Chasen for decades and says she was an authentic person.
"She loved the songwriter and she really made us feel important because songwriters are not always in front of the camera, but she had a sense that they were so important," Connors said.
No one has been arrested in Chasen's death and police remain tight-lipped about their investigation.
It was early Tuesday morning that Chasen was killed in Beverly Hills.
She was leaving an after-party for the premiere of the movie "Burlesque."
Police say they don't have a motive or suspects in the case, and friends are still shocked, saying she had no enemies.
"We know that she had some very tragic moments at the end and she was someone that said I love you to everyone," said actress-producer Merrie Lynn Ross, who was also in attendance Sunday. "Some of the people thought, 'Wow. She only says it to me.'"
Chasen worked for some of Hollywood's biggest stars and on campaigns for more than 100 movies.
On the night she died, Chasen was busy at work trying to build Oscar buzz for the "Burlesque" soundtrack.
"It's not that she would wear you down," said freelance radio reporter Alan Silverman. "She would convince you the right thing to do was to give coverage to a particular client, but she also was very selective on who she represented."
Chasen was buried at a private service attended only by family members.
Anyone with information on her murder is urged to call Beverly Hills police at (310) 288-2656.