Pop superstar Madonna is refusing to copy Radiohead by releasing her next album as a free download, even though she is one of the best-selling artists of all time.

The Material Girl star admires the British rockers and their brave move to release their latest album In Rainbows as a digital download - allowing fans to choose their own price for the record.

But the 49-year-old isn't ready to have the public judge how much they should pay for her music just yet.

She says: "It is a cool idea but I am not sure if it works exactly. It is like a new world out there and people have to try a lot of things and make mistakes.

"Some things will work and some things will not, but it is kind of revolutionary and we are in that strange moment - the darkness before the dawn before we really know what is next.

"I don't know if I want to put my songs out there and ask other people what it is worth, but I am definitely ready to try new things."

Hard Candy, the singer's 11th studio LP, is slated for worldwide release later this month.