which left Rivers with a face full of cake. WATCH: Get Styled By Joe Zee and QVC! Both Rivers and Miss Piggy were attending the QVC pre-Oscars party when they got into a heated fight. Check out ...

Today, a video showed up on YouTube, which revealed the culprit behind Joan Rivers run in with a cake. The video shows Joan Rivers and Miss Piggy getting into a fight at the QVC pre-Oscars party.