I am the biggest Melissa McCarthy fan. Ever since I saw her on "Bridesmaids" I have been a loyal fan ever since, seriously, I will go to every movie she puts out. Earlier this month McCarthy was guest-hosting for Ellen and she openly talked about how much she loves Billie Eilish's music. “I love her, I’m completely obsessed with her, we listen to her all the time. In fact, if you don’t like her, just get up and get out.” McCarthy said while she was guest-hosting. McCarthy went on to say that she thought they would make a great duo. Then, McCarthy introduced us to the wonderful and hilarious “Bad Guy” spoof. Besides from McCarthy’s love of her music, Eilish and McCarthy have a small-world moment: “Her mom was my first improv teacher. Maggie Baird, who was amazing,” McCarthy told Ellen Degeneres. Billie Eilish is currently on tour and knew that McCarthy would be visiting with Ellen, so it's only fair that Billie Eilish gets to scare McCarthy.