According to the New York Post's Page Six, the real-life couple and Place Beyond the Pines costars were at NYC's Bowery Hotel last Friday, March 29 when a male fashion photographer, who'd recently shot Mendes, 39, greeted her with a "Hey, baby!" "Ryan completely flipped out, and it got heated," an eyewitness is quoted as saying in the Post. Mendes' hunky boyfriend, 32, "got in the guy's face and said, 'Who are you calling baby?'" Mendes eventually had to intervene, the eyewitness says, to "calm everyone down before it came to fisticuffs. Ryan then made nice and shook the guy's hand." Awww... Confirmed, Ryan Gosling is the most perfect boyfriend ever!!