Ma’soumeh Dadehbala (Persian: معصومه دده‌بالا; April 10, 1942 – January 20, 1990), known by her stage name Hayedeh (Persian: هایده), was a Persian classical and pop music vocalist with a contralto vocal range. She was well known for her wide range of voice. She was active for more than two decades, and remains one of the most popular singers of Iran.

Ma’soumeh Dadehbala was born on 10 April 1942 in Tehran. She was the elder sister of another popular singer Mahasti.

Her professional career began in 1968 as a singer on a Persian traditional music program in Radio Tehran called “Golhâye Rangârang” (Persian: گلهای رنگارنگ “Colorful Flowers”) directed by Davoud Pirnia.