The Sinatra family said in a statement that he died of cardiac arrest while on tour in Daytona, FL, and that they mourn the untimely passing of their son, brother, family, and uncle, reported RollingStone magazine.
Though his father may have discouraged his son from going into the music business due to its challenges, Sinatra Jr followed in the footsteps of his famous father as well as worked by his side.
When he was 19, he was kidnapped and held for ransom, though he was released a few days later and the kidnappers were caught and convicted.
He was scheduled to perform at The Peabody Daytona Beach, which was billed as "Frank Sinatra Jr.: 'Sinatra Sings Sinatra' The Centennial Celebration," according to Ticketmaster.