Striking Miley's signature pose, The 1D singer modelled a pair of leggings plastered with the famous twerker's face as he stuck his tongue out for the camera.
Looking good, Niall!
Sending his photo directly to Miley, Niall tweeted: "@MileyCyrus you left these in New Jersey! They are comfortable, not gona lie #twerk #tongueout."
Clearly impressed by his efforts (or wanting her trousers back), Miley replied. Tweeting Niall back, she wrote: "f*** yasssss."
And it seems Niall's not the only celeb to play dress up this week, Fearne Cotton channelled her inner Harry Styles for her day at work and the resemblance was uncanny...
Niall and Harry join the rest of the 1D boys over in the States as they are currently taking their 'Where We Are' tour across the US and Canada.
But despite spending the best part of the next couple of months on the road, the boys have made sure to keep themselves entertained.
Funny guy, Liam Payne kept himself amused as he officially became Mrs Niall Horan on Twitter yesterday (5 August). Turning into the ultimate super-fan of his fellow bandmember, Liam had us all in hysterics as he created his own Niall shrine on the social media site.
Even tweeting, "OHHHH MY GODDDD I GOT A SELFIEEEEEEEE!", as he posted a picture of himself posing alongside his pal.
Oh, you guys!
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