Before it became a popular trend to showcase actors' real singing voices in musicals like Rock of Ages, Mamma Mia and Les Miserables, many vocal dubbers went uncredited to preserve the illusion that our stars were really belting it out on the big screen.
See if you can tell who was really singing, and who got some help.
Note: We added a few since this was first published in 2014. There are now 14 questions.
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