Singer Ariana Grande says she often forgets she's famous and admits she sometimes doesn't think about the fact that eyes are always on her.

But then, she also feels surprised when photographs of her wearing her pyjamas surface online.

"Maybe I'm a little bit more sensitive about things, but I try to keep it as real as possible. 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," she told Top of the Pops magazine, reports femalefirst.co.uk.

While she gets shocked when other people take photographs of her, the 21-year-old singer loves taking her own pictures, especially selfies alongside her beloved pet dogs.

She said: "I love taking selfies and I use filters when I take them. My favourite... is 'tonal' because I love black and white.

"My favourite selfie co-stars are my dogs. I have a really funny photo of my dog Coco that looks like she took it herself. A Coco selfie."