Hip-hop artist P.O.S. has been forced to cancel his fall tour plans [with the exception of the First Avenue show on October 26 ] due to an urgent need for a kidney transplant. All tickets purchased will be refunded and more details regarding his condition will be made available soon. Watch a video of him discussing the impending transplant and the cancellation of his tour, and don't forget to send him some well-wishes via Facebook and Twitter.