 Due to music clearance issues, some of the episodes on the DVD sets of the  show are edited. Some sketches simply have music replacements, while a few  sketches had to be trimmed to exclude certain musical performances by the  cast (such as Andrea Martin as Edith Prickley singing a line from "Whistle  While You Work" in a sketch, or Catherine OHara as Dusty Towne and Rick  Moranis as Merv Griffin having to cut out various songs they perform in their  sketches). As of Volume 3, none of the actual guest musical performances have  had to be cut. As of Volume 3, the only full sketch to be cut is "Stairways  to Heaven;" A Compilation Album of various artists performing "Stairway to  Heaven" 