Ella baila sola (English: She dances alone) is a Spanish musical duet formed by Marta Botía Alonso (Madrid, Spain, September 15, 1974) and Marilia Andrés Casares (Cuenca, Spain, December 17, 1974). The group dissolved in 2001. The group is active right now touring latin america with Marta, Marilia is not in the band anymore.