Liam Payne and Louis Tomlinson are clearly the best of friends and Louis even trusted Liam enough to allow his bandmate to give him a tattoo on stage. OK, it was only a temporary, Sharpie marker doodle, but that still takes some major trust.
Louis has a heart tattoo on his shoulder and Liam took it upon himself to just color the whole heart in during One Direction's show, live in front of a huge crowd.
But he didn't stop there. Liam scribbled something in the heart and we can't really tell what it says since Liam just quickly wrote it. Perhaps it's Liam's signature, or a mysterious word, or maybe even nothing in particular at all.
We may never know, but at least we have the memory of this Lilo moment to enjoy.
What do you think about Liam drawing on Louis' arm? Tell us in the comments below!