'Where Have You Been' beauty Rihanna has revealed that her mother was angry after she shared a couple of naked photographs on a social networking site.

During an interview with Elle magazine, the superstar explained that a friend of hers named Melissa Forde uploaded a few pictures that showed her in a state of undress for a "photo book" she's making and her mother caught sight of them, but wasn't too happy:

"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 (Forde) put up on Instagram, a sneak peek from a photo book she's making about me."

Rihanna added: "She went crazy on me, I was like embarrassed. I felt like I got my a** whipped in front of my class at school! She humbled the f**k out of me."

Watch Rihanna's video for 'Stay' here: