 During World War II, all the studios put out "all-star" vehicles which featured virtually every star on the lot--often playing themselves--in musical numbers and comedy skits, and were meant as morale-boosters to both the troops overseas and the civilians at home. This was Universal Pictures  effort. It features everyone from Donald O Connor to the Andrews Sisters to Orson Welles to W.C. Fields to George Raft to Marlene Dietrich, and dozens of other Universal players.