Radha Cuadrado (born December 13, 1976), popularly known as Radha Tinsay or simply as Radda, is a Filipino singer and songwriter best known as an original member of the international hip-hop group Kulay (previously known as "Boom") and was also part of the group "14-K". After leaving Kulay, she pursued a solo career and performed in theater and lounge shows. She later starred in the TV series Diva on GMA 7. Most recently, she took part in the first season of The Voice of the Philippines.