Ohhh all that cooped up testosterone is starting to take effect on the boys of One Direction it would seem.

The five singers have been caged in a tour bus and hotels for the last few weeks as they tour around America, and it seems that tensions are starting to rise, as during their recent concert in Mexico, Louis Tomlinson took his irritation out on poor Niall Horan, when he punched him while live on stage.

No, we’re talking crap. Actually it was all a bit of a joke…typical Louis!

The pair seemed to be facing off as they performed for the Mexican crowd, however they soon dissolved in fits of giggles, as it became clear that it was all one big mess about. Phew!

Niall seemed to enjoy the gig and later tweeted:

“im back! that was scary! great couple of days in mexico! thank you soo much for having us…back to the US for now!”

The jokes have been going on all week, and just days ago Harry Styles got his shirt ripped off whilst singing his solo section of ‘What Makes You Beautiful” and earlier in the week, the boys waited until he was sleeping and poured water down his trousers…..bad boys!

Watch Styles in all his bare chested glory below…