The couple were recently attending a party at real estate mogul Kurt Rappaport’s mansion in Malibu, where Jason noticed the 26-year-old getting a little too friendly with none other than Ryan Seacrest.
“Ryan was making her laugh, and she squeezed his arm,” an eyewitness says. “But when he put his hand around her waist, Jason couldn’t contain himself. He stormed over, looking really annoyed. He kept bumping Ryan’s arm and almost pushed him out of the way. Rosie was smiling but at the same time clearly trying to calm him down. Jason’s anger was evident to anyone who took a look at them. No one wanted to really approach them after that, and they left shortly afterward. Everyone was talking about it later on — it was seriously awkward!”