Coldplay frontman Chris Martin hopes to record a duet with Celine Dion in the near future, because he wants to push the band's sound to the limit.

The CLOCKS singer is determined to expand Coldplay's sphere of reference and believes a duet with Canadian Dion will help him achieve that aim.

He says, "We shouldn't restrict our options. To me, the most bizarre things at the moment are the most exciting.

"I'd even be up for making a didgeridoo album in Alice Springs."