Ellen Degeneres has a reputation for being upbeat, positive and advocating for her fans to practice kindness wherever they go. She's also known for creating amazing experiences ad uplifting comments on her talk show. Many of her fans may be surprised to know that Ellen has a notorious mean streak that many Hollywood personalities know about. Many have been insulted and uncomfortable after appearing on her show. Others have spoken out about off-screen encounters with the talk show host that left them speechless.