The Ross Sisters, an American sister act comprising Betsy Ann Ross

The Ross Sisters were an American sister act whose fusion of close-harmony singing with acrobatic contortion and specialty dance created a singular record of 1940s wartime variety performance. The three sisters grew up in West Texas, entering professional revue work by 1942, when their acrobatic specialty drew notice in the Boston production Count Me In. In 1943 they performed in Billy Rose's Post War Revue at New York's Diamond Horseshoe, leading to their breakthrough screen engagement at Metro-Goldwyn-Mayer. On 13 April 1944, Broadway Rhythm was released, featuring the sisters—credited as Maggie, Aggie, and Elmira—in their most celebrated work, the "Solid Potato Salad" sequence. That number begins as a rural novelty song and escalates into a display of deep backbends, leg-over-head balances, partner-linked shapes, and floor-to-standing transitions, all executed while preserving comic timing and vocal precision. After American nightclub engagements, the act moved to Britain, where they appeared in the 1946 Royal Variety Performance and the long-running London revue Piccadilly Hayride. By around 1950, all three had married, and the group ceased public performance. Their later prominence is largely archival; digital circulation and compilation screenings have made the MGM number visible to new audiences seeking documentation of extreme dance technique.