Jennifer Lopez put her impressive flexibility on full display in a behind-the-scenes video she shared on Instagram on Monday.The 51-year-old looked incredible as she rehearsed a dance sequence for her new single Cambia El Paso in a recording studio.MORE: Jennifer Lopez and daughter Emme spend day with Ben AffleckJLo took centre stage as she rolled around on a carpet, stretching her body into all sorts of positions and tapping her own famous derriere.WATCH: Jennifer Lopez showcases insane