#Directioners everywhere, get ready for the ultimate One Direction challenge! We may have challenged you to games like Guess the Disney Princess From Behind and a Guess Me From Behind: Celeb Edition, but this guessing game is completely, 100% for Directioners only!
Can you tell Zayn, Louis, Niall, Harry, and Liam apart — just from looking at their backs? This gallery will put your 1D knowledge to the test!
Click through the gallery to play the game and keep clicking the arrow to reveal the answer! Tell us in the comments: How many did you guess correctly?