CALABASAS, Calif. (KABC) -- Lisa Marie Presley - the only child of Elvis Presley and a singer-songwriter dedicated to her father's legacy - died Thursday after being hospitalized earlier that day, her mother said in a statement.Just days before that, she was in Memphis, Tennessee, at Graceland - the mansion where Elvis lived - to celebrate her father's birth anniversary on Jan. 8.Presley, who had previously been married to Michael Lockwood, Nicolas Cage, Michael Jackson and Danny Keough, had three other children - actress Riley Keough, Finley Aaron Love Lockwood and Harper Vivienne Ann Lockwood."I keep going because my son made it very clear in his final moments that taking care of his little sisters and looking out for them were on the forefront of his concerns and his mind.Presley, the only child of Elvis and Priscilla Presley, shared her father's brooding charisma - the hooded eyes, the insolent smile, the low, sultry voice - and followed him professionally, releasing her own rock albums in the 2000s, and appearing on stage with Pat Benatar and Richard Hawley among others."