Although most One Direction fans look at Harry Styles and think he has the perfect body, a source close to the band revealed that the singer wasn't too pleased with his image after seeing a picture of himself shirtless, courtesy of the paparazzi.

According to Entertainment Wise, while 1D is currently in the midst of their "Where We Are" tour a source revealed that Styles is desperate to get back to being healthly and has started drinking green tea and eating sushi to help stay fit.

An insider told Star magazine, "Harry wasn't that happy about recent pictures of his body. He thinks he's lost some definition and wants to hit the gym and get buff again."

The source added, "It's difficult to eat properly when the boys are on tour, but Harry asked for green tea and sushi to be added to the daily menus. He's also been careful to continue with the diet while the band take a couple of weeks off."

Meanwhile, One Direction's trainer Mark Jarvis has been keeping the guys in shape and took to his Twitter account to keep both his and 1D's followers in the loop about the workouts.

With the bigger stages for the concerts, it is important that the five gentlemen stay healthy. Meanwhile an out of shape Liam Payne couldn't help but take to Twitter and joke about going to "fat camp."

Back in March the One Direction member tweeted, "Lol just seen on twitter people think I'm fat? now I've never been called that before nice, on my way to mcdonalds then I'm off to fat camp."