Source: <a href=https://www.google.com/url?rct=j&sa=t&url=http://www.celebuzz.com/2014-08-12/calvin-harris-is-the-reason-rita-ora-didnt-perform-at-the-teen-choice-awards/&ct=ga&cd=CAIyGjViN2YyMDkwMTU0OTZhNWQ6Y29tOmVuOlVT&usg=AFQjCNH8fbt5nNJt2bWOyYP3aS6NKSAZYA class="colorbox" title="Calvin Harris is the Reason Rita Ora Didn’t Perform at the Teen Choice Awards” >calvin harris