Kanye West has expressed his disappointment after a hacker leaked an unfinished song from his new album.

The track, entitled 'Lost In The World', emerged on various blogs yesterday and includes a sample of Bon Iver's 'Woods'.

In a series of posts on Twitter, West said he had decided to cancel this week's Good Friday – where he gives a free song away – due to the leak.

“It's messed up that one hacker can mess everything up for everyone,” he said.

“I love to take a year to finish my songs and deliver them to you guys in there most completed form.

“It would have seemed like since I give free music every week even the lowest form of human being would respect that enough not to leak unfinished songs from my real album.”

West added that he was working with four engineers until 3am every night in an attempt to finish the album as soon as possible.

The rapper also revealed that he was struggling to come up with a title for the record, which is due out in November.

(by Jason Gregory)