It's the cover version that you didn't know you needed in your life.

Reese Witherspoon has taken on Taylor Swift's 'Shake It Off' and turned it into an EDM banger - but before you start wondering whether the Hollywood star has notions, it's for a new film.

Witherspoon teams up with comedian Nick Kroll on the Swift modern pop classic, which is taken from the soundtrack of new animated film 'Sing', which is out next month.

Hear their rather unusual duet - which sounds like Skrillex has got his hands on it - below...