Robert Pattinson Devastated Over Kristen Stewart Cheating

Robert Pattinson is heart broken and humiliated over Kristen Stewart cheating scandal, and I've got the shocking details here! With the recent shocking news of Kristen's love affair - everyone wants to know how Rob is doing? Well, apparently he may have known about the infidelity a week before it went public. A witness claims they saw the couple fighting backstage at Sunday's Teen Choice Awards.