Petersen joined brothers Barry, Robin and Maurice Gibb as part of the Bee Gees in 1966.
The country music icon's sister confirmed the sad news on social media.
The Minneapolis singer-songwriter released four albums from 1988 to 2011.
He broke a lot of ground at award shows, just as he did in the recording studio and on sound stages.
The 28-time Grammy winner died Sunday (Nov. 3).
The Brooklyn-bred producer worked with Jay-Z, 50 Cent, The Notorious B.I.G. & more.
He was one of the last singers of his kind -- and one of the best.
Titta worked with artists including Carole King, Lou Reed, Bon Jovi and Pearl Jam over a career spanning decades.
The singer helmed the mic for the legendary hard rock band from 1978-1981 before being replaced by longtime vocalist Bruce Dickinson.
“His passing leaves a deep void in the music and lives of those who knew him,” Vives said.
