So what's the real reason behind Justin and Selena's breakup? Well if you believe a certain friend of the couple, the split comes down to one word, Rihanna. Sources are dishing the scandalous details about a hot hotel hook up that happened during the early stages of Justin's relationship with Selena. Watch the video to know more on the story!<br /><br />For more Hollywood news and gossip:<br />http://www.youtube.com/hollywoodbackstage<br /><br />Subscribe at: <br />http://www.youtube.com/subscription_center?add_user=HollywoodBackstage<br /><br />Like us on Facebook:<br />http://www.facebook.com/hollywoodbackstage<br /><br />Follow us on Twitter:<br />https://twitter.com/#!/HollywoodBstage
