Miley Cyrus called in to On Air with Ryan Seacrest this morning to chat about her upcoming tour, and she also chatted about working with Kanye West and her 21st birthday plans.

The tour kicks off on Valentine's Day in Vancouver, and so far there are a total of 38 dates in North America. Miley said excitedly:
    “Literally my whole life is revolving around this tour right now. We’re putting together this tour that’s going to be insane … The minute you step into my arena, the whole thing feels like your a part of this crazy different world and you step in to a show the minute you walk in the door, rather than it being a show when I come onstage. I just want the whole arena to always have a vibe and it to be fun and be a totally different experience and nothing that’s obviously traditional.”

So what about her collaboration with Yeezy? Miley reveals that they met up after the VMAs and said:
    “We met up after the VMAs. He actually came and he watched my rehearsal for the VMAs and he was like, ‘You’re going to do something kind of insane tonight. It’s going to be memorable and awesome.’ And was really into it. I had wanted to go out after, but we had decided to go into the studio and we started working and my whole thing is no matter what I do, I just want to be around people that really believe in me. And that’s why him and I started working together.”

We're sure she's going to have some sort of celebration for her 21st birthday, but the night of her big day she'll actually be at rehearsals for the American Music Awards! "Exactly where everyone wants to be on their 21st birthday," Miley joked. "But actually… for me, is like the best birthday present ever because I get to perform at the AMAs.”

So how will her AMAs performance compare to her infamous VMAs set? Miley told Ryan:
    “I’m not going to give you any details, but I’ve got one of my favorite performances set up for the AMAs. We’ve made some really cool content and it’ll be different than anything I’ve ever done … I’ve saved this moment for the AMAs since it’s going to be such a cool day … People are going to talk about it for, I feel, like a different reason. It’s going to be more about the content that we’ve created. It’s going to be cool, beautiful, and modern.”

Click thru to see the complete Bangerz tour schedule!