"Viva Las Vegas" is a 1964 American Musical staring Elvis Presley and Ann-Margaret. The film is considered to be one of Presley's best films mostly due to the chemistry between Presley and Margret who truly believed Elvis to be her "Soulmate". The song "Viva Las Vegas" was performed in one single unedited shot and is the only known example of such a technique in Presley's film career.