Sheryl Crow says the original tapes of albums including Tuesday Night Music Club and The Globe Sessions went up in flames in a fire at Universal Studios.
The singer told the BBC "all her masters" were destroyed when an archive in Los Angeles burnt down in 2008.
She only discovered the loss this month, after her name was mentioned in a New York Times report that uncovered the extent of the damage.
"It absolutely grieves me," said Crow. "It feels a little apocalyptic.
"I can't understand, first and foremost, how you could store anything in a vault that didn't have sprinklers.
