Ariana Grande wishes she was as confident as Miley Cyrus.

The "Right There" singer is a huge fan of the controversial singer's raunchy antics - such as appearing naked in her "Wrecking Ball" video or twerking up against Robin Thicke at last year's MTV Video Music Awards - and thinks she brings something interesting to pop.

"I think she's dope, I think she's a rock star, I think she's expressing herself, and there's nothing wrong with adding a little fun into pop culture. I wish I had enough confidence to get naked and sit on a wrecking ball. If you had her body, you'd be on that ball right with her," she said.

Ariana also defended pop bad boy Justin Bieber after he was arrested for drink driving, resisting arrest and drag racing in Miami, Florida in the early hours of Thursday morning: "I think it's really serious. I've seen tweets of people making fun of the mugshot and all this stuff, and it's so ignorant. It's got to a point where I just want him to be okay. It's this very serious thing. It's not just like a kid who's, you know screwing around, it's dangerous. It's very serious and upsetting." Ariana, 20, also said she felt the troubled young star is lonely despite his vast popularity, adding, "He's the most visible and yet isolated human being I've ever met."