Khadijeh (Eftekhar) Dadehbala was born on 16 November 1946, in Tehran, Iran. She was the younger sister of Iranian singer Hayedeh. Their parents later divorced and married other people. Mahasti started her career on the Persian traditional music radio program “Gol hâ ye Rangârang” in 1963, with the song “Ân ke Delam Râ Borde Xodâyâ” composed and arranged by maestro Parviz Yahaghi with lyrics by Bijan Taraghi.