Factual error: Elvis and Ann Margaret take a trip in a helicopter over Hoover Dam and Lake Meade. They are flying in a small 2 seater copter with a bubble canopy and no doors. During the trip Elvis and Ann talk to each other without headphones or microphones in a normal tone of voice. In that type of helicopter, especially one with no doors, the sound would have been deafening and they wouldn't have heard each other even while screaming.
Viva Las Vegas (1964)
1 factual error
Directed by: George Sidney
Starring: Ann-Margret, Elvis Presley, William Demarest, Cesare Danova
Continuity mistake: Ann Margaret is seen dancing with high heeled shoes at the beginning of a dance routine and during the routine is seen in flat ballet shoes, then near the end she is seen wearing high heeled shoes again.
Rusty Martin: I heard about your money, Lucky, I'm sorry.
Lucky Jackson: It's only money.
Rusty Martin: Only money! Do you realise how hard it is to earn money?
Lucky Jackson: But I won it.
Trivia: After the filming, Ann-Margret told the press that she and Elvis were lovers and were going to get married. Tom Parker put an end to the story. Elvis sent her a red heart shaped bed, but the two never spoke again.