Celebrity·Posted on May 13, 2014Sad Justin Bieber On A HorseHe spent yesterday riding a horse at Griffith Park in Los Angeles. But why so sad????by Whitney JeffersonBuzzFeed StaffLinkFacebookPinterestTwitterMail It was a nice day for horseback riding for Justin Bieber. But then it got hot. So The Biebes rode along shirtless. Everything was going fine... Until * something* happened... ...that caused Bieber to look like this. :( Was it something the horse said?