The 1D guys look to be having a great time on the music video shoot, but Harry's wet t-shirt reveals something else... new ink!
Harry tweeted after the shoot: "Day two finished, and that's the video for 'Live While We're Young' done. Amazing crew, amazing people involved. Thanks again .x"
No mention of Harry's tattoo, however, which had Directioners straining their eyes to figure out what it is.
Some fans are convinced that it's Harry's X Factor audition number, 165998.
We can't wait to see the One Direction Live While We're Young video, which appears to include a swimming pool, trampoline, Niall shirtless, and a giant inflatable banana.
It's the bomb: Check out some hilarious photobombs and vote for your faves right here!
Gallery | Awww!! One Direction as Babies!