Katy Perryhas spoken about the meaning behind her new single John Mayer- later took part in a Q&A with Mario Lopez, where she teased that her upcoming 2014 tour is "about colour".

She said: "It's a wide variety of different color on the record. I'm gonna go on tour next year, I'm going to play all those songs. Every song that you want to hear like I love when you go and see as how and you see all the hits from an artist. I love that and that's what I'm gonna do."

For those who can't wait for K-Pez's tour, you can catch her performing Unconditionally at the 2013 MTV EMA, which broadcasts live on Sunday, November 10 at 8PM from the Ziggo Dome in Amsterdam.

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