Kim Kardashian and her sister Kourtney celebrated their reunion in Miami this morning by taking a jog along South Beach testing out the new fitness trend Kangoo Jumps. They're together again after Kim spent a week away from Florida and partied with their parents Kris and Bruce back in LA. Kim's soon to be off again with her scheduled travels to Australia next week, but she should be able to fit in plenty of time to bond with Mason and lounge in her bikini. She's single after splitting from Reggie Bush, but there is some love blossoming elsewhere in the Kardashian-Jenner family — Kim's stepbrother Brody was just spotted enjoying a makeout session with Avril Lavigne.