One Direction's single hasn't even been officially released yet (not long to go though!) and it's getting covered by some of our favourite popstars already.
They're sitting by the same massive curtains we saw in their Swagger Jagger cover video, and Sian's doing that movey-aroundy-thing with her hands again, which makes it all more intense. We like it.
What do you think of their cover? The girls have been lending their accapella croons to a few tracks - what would you like to see them cover next?
We're voting for something by Li'l Wayne.