Teresa's daughter Yolundria Rooks, tells us the viral star -- famous covering Billie Eilish's 'What Was I Made For?' -- that her mom passed away at home Wednesday in Stockton, CA ... where we're told she was surrounded by family and loved ones.

We're told Teresa had been dealing with ovarian cancer of late, and it had recently spread to her lungs. Yolundria says her mother didn't tell her family she had cancer till November 2023 when she was sick in the hospital ... adding she had been in considerable pain since.

She adds ... the coroner came to the home to get her mother's body ... and her family now wants to have Teresa's remains flown back to Macon, GA, to be buried next to her son Josiah -- which Yolundria is now raising money to cover the costs for on GoFundMe.

Yolundria writes, "It is with a heavy heart to announce that my mother The Icon, The Diva, Miss Teresa Smith also known as 'Queenzzielocthevoice' has suddenly passed away."

She adds ... "As the eldest child I will now be taking on full responsibility of all my younger siblings so anything that is donated beyond the funeral cost and expenses will be invested in them, their needs, and their future," she continued. "As I have to prepare and get ready to send my Queen home, I just want to thank all those who loved my mom!"

Teresa enjoyed TikTok success after going viral for her cover of Billie's 'Barbie' song. She was also known for her catchphrase, "Be who you are for pride," and her bright-colored hair.

She was 48.

RIP