The 25-year-old singer says she doesn't care what anyone thinks of her but admitted her mother can really intimidate her, reported Elle.
The 'Diamonds' singer says, "I'm not afraid of any person in this world but my mother. I'm terrified of her!
"She called me two days ago and reeled me in about two naked pictures Melissa (Rihanna's best friend) put up on Instagram a sneak-peek from a photo book she's making about me. My mom, she went crazy on me," she added.
Explaining how she felt after talking to her mother, the singer said, "I was like embarrassed."