Friends and family of Simone Battle say the rising star's suicide could have been over the G.R.L. singer's struggle with financial problems.
County Coroner's Lieutenant Fred Corral later confirmed the young singer had killed herself.
According to reports in the US, those close to the former 'X Factor' finalist told police she had recently become depressed over money issues and that she was frustrated that she had yet to hit the big time.
G.R.L. - who scored their first UK hit this week with their single 'Ugly Heart' - were formed by Pussycat Dolls founder Robin Antin.
A joint statement from Robin, Reign Deer Entertainment, Kemosabe Records, and RCA Records was released on Saturday afternoon following Simone's death.
“We are deeply saddened by the tragic news of the loss of Simone Battle of G.R.L.
“Simone was an exceptional young talent and human being, and we are all devastated to learn of her passing. Our thoughts and prayers are with her family and loved ones at this time.”
It was followed by a statement from Simone's distraught GRL bandmates, which read: "Words cannot express the depth of our loss.
"Simone's incredible talent was only surpassed by the size of her heart.
"We will carry her memory with us in everything we do."
If you've been affected by the issues in this article, please call the Samaritans on 08457 90 90 90.