The spokesman, in an official release from the Barbara Sinatra Children's Center, said she died of natural causes and was surrounded by friends and family at the time of her death.
Barbara was born Barbara Blakeley in Bosworth, Missouri and began her modelling career as a teenager after moving to Long Beach, California with her family in the 1950s.
Branden Grace makes men's major history
And I just want to get out there again tomorrow (Sunday) and try to do something similar, just play some good Golf. Spieth's second bogey-free round of the three so far put him at 11-under par 199.
In March the Children's Hospital Los Angeles partnered with the center to raise $250,000 for services for children and their families being treated at both facilities, according to KESQ.
She married Frank Sinatra in 1976 when he was 61 and she was 49 and the couple were married for 22 years until he passed away in 1998.
Barbara is survived by her son Robert.
Spielberg warns VR will rule the future at Comic-Con
Steven Spielberg has warned that a future ruled by virtual reality is coming "whether we like it or not". Cline, who also wrote the cult classic movie Fanboys , has always been obsessed with 1980s nerd culture.
"Barbara started raising funds for it in 1985 with Frank's support", Thoresen said.
"I've tried to analyze it", Barbara told The Desert Sun. "It's something you can't explain why or how it happened".
"He was always very much a gentleman and he really cared about treating me well", Sinatra told the New York Times in 2011 about her famous husband.
Watch Liverpool vs Crystal Palace live on TV, Online
And Liverpool doubled their advantage with 10 minutes to play. "He saw the opportunity and we could see it also". Palace will now play West Brom in the 3rd/4th playoff game on Saturday morning at 11am (BST).
Barbara and Frank Sinatra Wednesday in 1976 in a private ceremony at the Annenberg Estate in Rancho Mirage. She built a foundation to help abused children at Eisenhower Medical Center.