Star Wars Episode 4: A New Hope - Aunt Ventriloquist
In every scene where Aunt Beru speaks, her words don't quite match up with her lips. This happened because Lucas thought she was too quiet in her scenes, so he had the actress re-dub her lines.
Actually if you have an original copy of STAR WARS (NO EPISODE FOUR HEADING)You'll notice the actress delivers her dialogue with a much more upbeat tone in her voice (which throws out the continuity of the scenes compared to everything else. Another glaring example is when at the death star attack Luke original line of "Blast It wedge where are you" was changed to "blast it biggs" to establish the earlier scenes (restored)of the friendship of biggs and luke.