Fame not all it's cracked up to be? Grumpy Justin Bieber complains of a bad back and 'crazy' journey as he lands in Oz

By Daily Mail ReporterScowling: A grumpy Justin Bieber touches down in rainy Brisbane, Australia yesterday, where he held a hand behind his bad backAt 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