Stand up straight boy! Justin Bieber walks like a hunchback during shirtless beach stroll

With his shirt off and his shoulders stooped, Justin Bieber could have been auditioning for a part in The Hunchback Of Notre Dame. But in reality he was just walking along the beach with a bit of bad posture…According to the Mayo Clinic, bad posture can cause back pain, headaches, fatigue and sore muscles.