Chris Martin listens to ''a lot of Katy Perry''.

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: