United Kingdom, Dec. 11 -- Tate McRae relies on her alter-ego when she's on stage.

The 22-year-old pop star admits that she's naturally "very introspective, very sensitive, very introverted" - but Tate allows her alter-ego, Tatiana, to take over when she's on stage.

Tate told Rolling Stone magazine: "I started to black out onstage and become this person that I couldn't explain, nor could my family or my friends, and I needed a reason for it. And I think it helps me grasp the strange theory of why I'm not nervous in front of 15,000 people, and why I can be nervous at a dinner party with four people.'

Tate admits that her alter-ego is distinctly different from her real-life self.

She explained: "Tate is this very introspective, very sen...