When asked which member of the group has the best abs, Niall picked Liam. "Payne-o! That fellow is ripped," Niall said. "He works hard at it though, so I'll give him that."
Though Niall and the rest of the guys do deserve credit considering they're all putting in a lot of hours at the gym. But whose workouts do you think are paying off the most?
Click through the above slideshow to see shirtless pics of One Direction, then vote for which guy has the best abs in the poll.