Aigiri nandini is a popular Hindu devotional song dedicated to the goddess Durga. The song is traditionally sung during the Navratri festival, which celebrates the nine nights of the goddess' victory over the demon Mahishasura. The song is based on a Sanskrit hymn from the Markandeya Purana, and its lyrics praise the goddess Durga for her victory over the demon Mahishasura. Aigiri nandini is a popular choice for ringtones, as it is both devotional and upbeat. It is also a popular choice for Navratri celebrations, as it is a reminder of the goddess' victory over evil.