entertainment-tonight Justin Bieber Spent 4th of July Weekend Partying With Kourtney Kardashian, Dancing to Rihanna and Wakeboarding in his Underwear For a Canadian, Justin Bieber knows how to enjoy a wild Fourth of July weekend! Justin Bieber Spent 4th of July Weekend Partying With Kourtney Kardashian, Dancing to Rihanna and Wakeboarding in his Underwear http://ftpcontent.worldnow.com/kfmb/syndication/et/2625.html Close Ad