Harry left little to the imagination in his outfit, which was posted online by his mate and One Direction's stylist, Lou Teasdale.
It didn't take 1D fans long to notice the revealing snap, which gained over 168,000 'likes' within 18 hours of being uploaded.
Harry posed like Miley by sticking his tongue out, in homage to her controversial appearance at the awards do in August, where she wore very little and writhed around on stage with Robin Thicke.
The boys have been busy promoting their film This Is Us and travelling the world with their Take Me Home tour, which wrapped on Sunday night in Japan.
And though Harry's certainly not the first celeb to mimic Miley's look (we're thinking about you, Paris Hilton) we reckon his is by far the best.
A chance to get an eyeful of Hazza's ever-growing tattoo collection... What's not to love?
Have your say! Who wore it best, Harry or Miley?
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Watch One Direction's video for 'Story Of My Life' below: