Carly Rae Jepsen Expects Justin Bieber Tour To Be A 'Whoa Moment'

'I don't know what to expect,' she tells MTV News about the world tour kicking off in September.

With only a couple short months until Carly Rae Jepsen hits the road with her pal Justin Bieber, the singer is warming up with some summer tour dates. But, the scope of these shows is miniscule compared to playing to an arena filled with Beliebers.

"I don't know what to expect," she told MTV News earlier this month before she took the stage in Chicago for the Pop-Tarts Crazy Good Summer Concert. While it gave pop-music lovers a taste of what the "Call Me Maybe" singer can do in concert, it didn't look anything like the highly anticipated, sure-to-be-massive Believe tour kicking off in September.

However, Jepsen isn't going into the experience completely blind. She did get an idea of what the tour will feel like when she played with Bieber abroad earlier this year. She added, "I did one or two shows with Justin. One in London and one in Mexico City, and all I can say is, like, 'Wow.' They were huge — 300,000 people in Mexico City. I was speechless."

Given just how overwhelming it can be to play in front of that many people, it's just one of the many things about 2012 that has left the singer floored.

"[How do you] take it in? I don't know that I totally do," she said. "I think that like in 10 years' time I'm gonna sit back and look at everything that's happening to me this year and actually have a 'whoa' kind of a moment. Right now everything's so fast and the pace of it so quick that I'm just kind of keeping my head to the ground and trying to do the best at getting through it."

In addition to hitting the road with Bieber, the singers will both appear on her debut album, also dropping in September. So, what should fans expect from that collaboration? "The Justin song, I'm kind of sworn to secrecy on because I think we want to release it together at one moment," Jepsen said. "But the rest of the album, I'm really excited for."

Are you going to see Carly Rae Jepsen and Justin Bieber on tour? Leave your comment below!