John Travolta said he was "so sorry" as he led the celebrity tributes to Lisa Marie Presley, who has died at the age of 54.
The only child of legendary singer Elvis Presley was rushed to hospital on Thursday after paramedics had performed CPR on the star following cardiac arrest at her house in Calabasas.
They were able to regain a pulse before transporting the 54-year-old to hospital, TMZ reported at the time. Lisa Marie was then put into an induced coma as medics desperately tried to save her.