Melissa Etheridge’s son Beckett Cypher died Wednesday at 21.
"Today I joined the hundreds of thousands of families who have lost loved ones to opioid addiction," read a message the singer shared on social media. She said Beckett "struggled to overcome his addiction and finally succumbed to it today."
Beckett was born to Etheridge’s then-partner Julie Cypher through artificial insemination. Singer David Crosby was later revealed to be the biological father. (Late Wednesday, Crosby tweeted "Not true" in response to a tweet that suggested he was nothing more than a sperm donor.)
"My heart is broken," Etheridge wrote. "We struggle with what else we could have done to save him, and in the end we know he is out of the pain now.
"I will sing again, soon. It has always healed me."
Beckett leaves behind sister Bailey, 23, and half-siblings, 13-year-old twins Miller and Johnnie. (Beckett is also a half-brother to Crosby's four children.)
This article has been updated since it was first published.