Jett's Memorial Held in Florida

(REUTERS/Courtesy of the Travolta family/Rogers & Cowan /Landov )

Friends and family said goodbye to John Travolta's son Jett in a small private memorial service, held on Thursday in Florida, where the Travoltas have their main home.

Travolta and his wife Kelly Preston called the outpouring of love from around the world, "a beautiful reminder of the inherent goodness in the human spirit."

Jett, 16, died nearly one week ago on Jan. 2, after suffering a seizure while on vacation in the Bahamas with his family.

Much has been speculated over Jett's health--he had a history of seizures but Travolta and Preston have only said that their son suffered from Kawasaki syndrome when he was a toddler.

Jett, whose remains were cremated in the Bahamas earlier this week, was expected to be given a Scientology memorial in line with the belief that, while there is no heaven or hell, individuals live on as immortal spiritual beings.

Travolta and Preston are leading members of the Church of Scientology, which was founded by science fiction writer L. Ron Hubbard in 1954.

Controversy has arisen over whether their Scientology beliefs affected their management of Jett's medical condition, but supporters including singer Lisa Marie Presley deny this.