"Life wasn't fair to you, that I know," her sister Angel wrote in a tribute.
"We hold a special place in our hearts for the time we spent playing music, laughing and traveling together," the country group, which now goes by The Chicks, wrote.
The Bronx native joined the Santa Monica-based public radio station in 1977 when it had five employees and the oldest transmitter west of the Mississippi.
Ladd was the inspiration for Tom Petty's "The Last DJ."
"Happy memories, rock in peace Colin," the legendary rock band wrote.
The artist was performing at a private event in Bahia when he collapsed onstage.
The singer had recently been hospitalized with encephalitis.
The 1971 hit was her first single for Stax Records.
The industrial rock band confirmed that their founding member died after suffering a stroke.
Marty and his brother Sid brought a trippy sensibility to children’s TV and brought singing siblings Donny and Marie Osmond and Barbara Mandrell and her sisters to primetime.
