Authorities began a search for Rivera after her four-year-old son was found floating alone in a rented boat in Lake Piru.
Preston passed following a two-year battle with breast cancer, her husband John Travolta confirmed.
She also snapped shots of David Bowie, Bob Dylan, Jimi Hendrix, and Nico, among others.
The Country Music Hall of Fame member suffered a hemorrhagic stroke.
The Oscar winner had fallen last week in his home in Rome.
The Tony Award-nominated actor had been hospitalized since late March.
The artist also known as Stepa J. Groggs died on Monday, June 29th.
He also wrote songs for Frank Sinatra and Quincy Jones, plus scored Caddyshack.
Legendary comedian, actor director’s career spanned seven decades.
After a long battle with Parkinson’s disease.
Known for his work in everything from Toy Story to Shrek to Wreck-It Ralph.
The shooting occurred in the St. Louis suburb of Kinloch on Thursday night.