By Daily Mail Reporter
Scowling: A grumpy Justin Bieber touches down in rainy Brisbane, Australia yesterday, where he held a hand behind his bad back
At just 17-years-old, he is the biggest teenage heartthrob in the world and already a multi-millionaire.
But the pressures of fame seemed to be getting a little much for Justin Bieber yesterday.
The Canadian singer looked distinctly grumpy as he arrived at Brisbane airport in Australia as he tweeted he had 'messed up' his back.
'Crazy 24 hours of travel...back is messed up....but we are smiling. We finally made it. AUSTRALIA we are here. Brisbane Leggo!' he wrote yesterday.
The star didn't raise a smile as he disembarked from the plane in pouring rain, wearing a casual outfit of black T-shirt, grey tracksuit bottoms and a backwards baseball cap.
And having to perform his trademark dance moves in the Australian city last night may have also taken its toll.
Don't rain on my parade: The singer didn't raise a smile as he arrived in rain lashed Sydney
'Back is in ALOT of pain but incredible show tonight. BRISBANE was #BEAST - Australia is about to be a party the next 2 weeks,' he tweeted.
Today, he was keen to take it easy, with his back still causing problems. He tweeted: 'Gonna rest up....back is killing me.'
Bieber is in Australia after completing the Indonesian leg of his world tour where he also seems to have encountered some travel problems.
'After a long 24 hours and some crazy plane trouble we finally made it out. Thank you to Indonesia and our secret day in BALI,' he wrote on his Twitter page.