Some people believe Louis' paper airplane tattoo on his right arm might be a tribute to Harry Styles, since the "Sign Of The Times" singer famously wore a paper airplane necklace all the time in 2012. It could also just be symbolic for all the plane rides Louis had to take in the band, or it could just be another random doodle, since he explained to Teen Vogue, "To be honest, not many of [my tattoos] actually have any meaning. I just like to look at them."
