Taylor Swift 'I Knew You Were Trouble' a cappella cover - watch

An a cappella cover of Taylor Swift's 'I Knew You Were Trouble' has gone viral on the internet.

Performed by Walk Off the Earth and featuring KRNFX, the group features vocalist Sarah Blackwood singing Swift's part, supported by backing vocals and some beatboxing.



The cover has been a huge hit, with more than 800,000 views on YouTube.

Over 37,000 users have 'liked' the Canadian group's video, which was uploaded on New Year's Day.

One YouTube commenter posted: "Love this! Can they forever replace Taylor Swift?"

Another said: "This is the best cover I've ever seen of anything by anyone."

> Man covers pop songs on violin: Justin Bieber, Ellie Goulding, more
> 'Call Me Maybe', 'Call Me' mash-up acoustic cover - watch

Listen to the original song by Taylor Swift below: