Miley Cyrus' iHeartRadio set in Las Vegas nearly took a dark turn due to a man cops say is obsessed with knocking her up -- and it was only her eagle-eyed bodyguards who prevented disaster. Also ... Joaquin Phoenix's performance as the Joker in Todd Phillips' dark take on the Batman villain is getting huge buzz, but at least one theater in Aurora, Colorado won't be showing the film ... the venue where the 2012 mass shooting occurred.