When Swedish indie-pop trio Peter Bjorn and John sent their new song to Kanye West, they may not have known that the rapper would leak it onto the internet - but that's precisely what he's done.

A link to 'Nothing to Worry About', which is from PB&J's new album 'Living Thing', was posted on West's blog on Tuesday with the accompanying text:

"WORLD PREMIERE ... THEY SENT THE SONG TO ME FIRST! PETER BJORN & JOHN... SHIT IS DOPE!! DRUMS ARE CRAZY AND I LIKE THE KIDS ON THE HOOK. THERE NEW ALBUM IS CALLED "LIVING THING" ..... WITH ALL THAT SAID I DON'T KNOW THE NAME OF THE SONG... LOL!!!... I'M GONNA ASSUME IT'S CALLED, "NOTHING TO WORRY ABOUT"

The post in question can be seen here.