Cher has opened up about the moment she found out that her legal name was something different to what she'd believed it was her whole life.
The singer, 78, has been sharing stories from her illustrious life in her new book, Cher: The Memoir, Part One.
As well as opening up about her much-publicized marriage to Sonny Bono, the star also revealed how she discovered her name wasn't actually what she'd been led to believe her whole life.
Cher revealed that she was "shocked" when she went to change her name legally and found that her registered name wasn't in fact Cherilyn, as she'd been told.
She explained in the extract, shared by the Daily Mail: "I believed Cherilyn was my name until the day years later when I decided to legally change my name to simply Cher."
The star was stunned to find out that, due to a mix-up in the hospital after her birth, her real name was actually Cheryl.
She revealed that the mix-up happened after her mother - who was only 19 when she gave birth to Cher - went into labor a month before her due date in 1946.
The future Goddess of Pop was born following a long and unmedicated labor, with Cher writing: "She was exhausted by the time I arrived at around 7:30 a.m. on Monday, May 20."
While her mom was recovering after giving birth, a nurse asked her what she wanted the name of her new baby girl to be - which is when the mistake occurred.
"My mother had no idea, but the woman insisted so she replied, 'Well, Lana Turner's my favorite actress and her little girl's called Cheryl. My mother's name is Lynda, so how about Cherilyn?'", she wrote.
The misunderstanding only came to light later in Cher's life when she went to legally change her name to Cher in the late '70s.
By then, the singer had accumulated four surnames - her birth name of Sarkisian, her stepfather Gilbert LaPiere's surname, as well as those of her ex-husbands, Sonny Bono and Greg Allman.
Deciding to go by just Cher, the singer needed to present her birth certificate for the name change, and it was then that she realized her name wasn't what she'd always believed it to be,
After seeing her birth certificate, Cher confronted her mother, saying: "I was shocked to discover that I was officially registered as Cheryl and asked my mother, 'Do you even known my real name, Mom?'"
Her mom apparently replied: "I was only a teenager, and I was in a lot of pain. Give me a break."
She had also previously opened up about her decision to change her legal name to Cher in 1979, telling Johnny Carson on The Tonight Show at the time: "I like it.
"It's better for me than having people wonder if they should call me Mrs. Allman or Mrs. Bono or Mrs. Bono Allman or Miss Cher or whatever.
"I mean, Cher is just fine. Just plain Cher."