The boybander has been snapped preparing for a show wearing just a towel, sending fans into meltdown.
Louis showed off his growing collection of tattoos, as he bared his chest in the backstage photo posted on One Direction's Instagram page.
The lads are currently Down Under as part of their Take Me Home world tour, and LouLou has been struggling with his vocals since arriving.
He tweeted on Saturday: "Lost voice :("
The poor lamb isn't having much luck of late - first he was snapped vomiting during a charity football match after being floored by a nasty tackle, and then he slipped over on stage in front of thousands.