The Coldplay frontman loves to put on some of the 30-year-old singer's hits of an evening, and admits after listening to many of 'Firework' hitmaker's tracks he thinks her music sounds a lot like grunge outfit Nirvana.
Speaking about the creative process behind Coldplay's hit 'A Sky Full of Stars', he said: ''I'll tell you the truth, I was listening to a lot of Katy Perry.
''A lot of her songs have the same chord sequence the whole time ... and then I realised a lot of other people have done that, Nirvana being a classic example, with 'Smells Like Teen Spirit'.''
While Chris' lyrics are often the subject of plenty of praise, the 37-year-old star insists he doesn't think much of his own song words.
Speaking in 'Beat x Beat' video, which can be seen on the official Beats by Dre You Tube channel, he added: ''I'm not the most poetic of lyricists, but I know what feels right.''
Chris admitted 'A Sky Full of Stars' was inspired by him also listening to a lot of electronic dance music and he was glad to get some help from Swedish DJ Avicii.
He said: ''I asked Avicci for help and he said 'yeah', with his backwards cap, and said, 'That'll be $12 million' ... no he didn't.''
Chris featured in latest 'Beat x Beat' series which can be seen on the official Beats by Dre You Tube channel: http://youtu.be/BJ78bwKOUs4
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