Kimberly Dianne Shattuck, the lead singer, guitarist, and songwriter of the Muffs, has died at the age of 56.

The sad news was confirmed by her husband, Kevin Suth, via social media. The cause of her death was a two-year battle with amyotrophic lateral sclerosis (ALS.) “This morning the love of my life Kim passed peacefully in her sleep after a two year struggle with ALS,” he captioned a photo of their wedding day. “I am the man I am today because of her. She will live with all of us through her music, our shared memories and in her fierce creative spirit. I love you always my Kimmy. Thank you for sharing your life with me.”

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My heart is forever broken

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Shattuck’s death comes just weeks before the Muffs were set to release their newest album, No Holiday, on October 18.

The Muffs was formed in 1991, and they have released four full-length studio albums in the 1990s. The band is best known for their cover of Kim Wilde’s “Kids in America,” which appeared on the 1995 soundtrack of Clueless.

Her fellow musicians shared touching tribute to Shattuck, including Green Day’s Billie Joe Armstrong, “She was always so cool and tough,” wrote the singer, “we will hear that rock n roll scream from heaven.”