Last I saw Molly Shannon anywhere was 2006--she had a small role in Talladega Nights, which I still like, and would not want Step Brothers sucking to deter Ferrell and Reilly from working together again.
Oh, Superstar. A very obnoxious movie and I thought so even then--because I have to cop to seeing in theaters. With a friend! I swear! I swear! There were a lot of very bad SNL movies back then (A Night At The Roxbury, The Ladies Man) and Wayne's World was a very distant memory by then.