In this classic footage from the movie "Broadway Rhythm" (1944), the Ross sisters, Aggie, Maggie and Elmira, sing and move in ways that don't look humanly possible. Yoga anyone? Movie buffs will recognize the tune as one of the background instrumentals from "The Godfather."
It starts out looking like another kitschy 40's tune, but give it a minute. Things get wild!
(Extra trivia: While the Ross Sisters are billed in their act as Aggie, Maggie and Elmira Ross, their real-life names were actually Vicki, Dixie and Betsy Ross.)