Rihanna is terrified of her mother.

The 25-year-old singer says she doesn't care what anyone thinks of her but admitted her mother can ''humble the f**k'' out of her.

She told Elle UK: ''Well I Instagram everything about my life, whether it's smoking pot, in a strip club, reading a Bible verse - how crazy, I know! - or hanging out with my best friend, who happens to be Chris [Brown].

''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.

''I was like embarrassed. I felt like I got my ass whupped in front of my class in school! She said, 'This was like a private moment and you're just parading this around.' She humbled the f**k out of me.''

Rihanna has been blasted for reconciling with Chris - who is still on probation for beating her up in 2009 - but says she doesn't care what people think.

She explained: ''[My new single] 'Stay' is a story about having love that close and wanting it to last forever. You don't have that feeling with everybody so when you have it you don't want to let go of it. I would definitely say that he is the one I have that kind of relationship with.

''Now that we're adults we can do this right. We got a fresh start and I'm thankful for that. Right now that's just what we want, a great friendship that's unbreakable.

''Everybody wanted to know what was happening in my life. Is she a drug addict? No. Is she an alcoholic? No. Is she a victim? No. That's when I got the gun [tattoo]. It was a symbol of strength. I'll never be a victim.

''That's why I'm posting pictures of myself smoking pot, to tell the truth about myself. I've got so much to think about, why bring all this extra s**t by being dishonest?''