Melissa Etheridge and Julie Cypher’s son, Beckett, has died. He was 21. 

The “I’m the Only One” singer’s team announced the heartbreaking news on her Twitter on Wednesday. No cause of death was shared. Etheridge’s rep has no comment at this time.

We’re sad to inform you that Melissa’s son Beckett passed away and there will not be a Concerts From Home show today,

The tweet from Etheridge’s Twitter page stated. The post quickly filled with fans and friends expressing their condolences and sending their well-wishes.

No further information was available at press time, but the rep said a statement is forthcoming.

During their relationship, Etheridge and Cypher welcomed Beckett in 1998 via artificial insemination. They also had daughter Bailey Jean in February 1997. The pair split in 2000.

Etheridge is also mother to 13-year-old twins, son Miller and daughter Johnnie, from her relationship with Tammy Lynn Michaels.

In an interview with Parents.com, Etheridge opened up about using donors to expand her family.

There’s nothing like taking the responsibility or creating the responsibility of bringing a human being into this world and helping it in its first years,” she said. “It doesn’t matter the equation that gets you there or what you are to that person. It doesn’t matter at all. It is the bond between you and the child.