The 21-year-old singer admitted she sometimes does not think about the fact that people are watching her and is surprised when pictures of her out in public wearing her pyjamas surface online, reported Female First.
"Sometimes I'll forget and go outside in my pyjamas and the next day I'll see a bunch of photos of me at the grocery store. That's always weird."
Talking about how fame has changed her, the "Problem" singer said, "Maybe I'm a little bit more sensitive about things, but I try to keep it as real as possible.