With all his jumping and jerking his back up on stage all day, we're not surprised to hear it happened! Pop star Justin Bieber recently hurt his back right before flying in to perform in Australia. When Justin touched down in Brisbane on Tuesday he was seen grimacing and rubbing his back while exiting the airport, and now he is apparently in such agony that he spends all his free time just laying on the bed of his hotel room!He took to his Twitter account to talk about the pain, "Crazy 24 hours of travel, back is messed up, but we are smiling. We finally made it. AUSTRALIA we are here! back is in ALOT of pain, gonna rest up, back is killing me."We bet teen girls all over the world are just dying to give him a back massage right about now!