Rams' Jumbotron Mistakes Big Sean & Jhene Aiko For Sarah Michelle Geller & Freddie Prinze Jr.

The Rams' huge win didn't go off seamlessly on Sunday ... 'cause the Jumbotron operator at their stadium mistook Big Sean and Jhene Aiko for Sarah Michelle Gellar and Freddie Prinze Jr. -- and the scene was hilarious. Just before L.A. beat the San…