The title of her fifth album, 31:31, was inspired by her birthday (March 31), her age when she completed this album, and the completion date of this album production (March 31). Later, she tended to make songs about the relationship of God and people as His]servants. She also knew that lyrics about human relationships are not considered as anthems of worship in churches. Sari later knew that pop songs are the easiest to be sung by churches in Indonesia. The third and fourth albums successfully sold about 30.000 copies. Sari decided to make the third album be more in the pop style. Churches considered that R&B music was not suitable to be used as worship anthems in Indonesia. The first and second albums weren't so successful due to their genre, R&B. Sari made a major contribution as lead vocalist, along with Ruth Sahanaya and Sidney Mohede, to this group. In 1996, they officially established True Worshippers with Mohede (her partner in VOG) as the founder. She learned many things about singing and song writing from this community. In her community named JPCC (Jakarta Praise Community Church) (kind of God's servant community), Sari met acquaintances who would later be part of True Worshippers, such as Sidney Mohede, Ucok Radjaguguk, and Daniel Sigarlaki. In October 2009, VOG held a reunion concert.

Their second album was the last album before they disbanded.

The VOG formation of the second album, Tutur Kata]], was: The VOG formation of the first album, Kusadari, was: Their songs appeared on 'The Song Chart' of the radio stations in Jakarta. Their first two albums were Kusadari and Tutur Kata. They made songs that contained positive messages and were universal, and so were liked by all circles. In the late 1980s, when the world Christian spiritual music had not evolved to the point it is today, VOG wanted to make more contemporary alternative music for the younger generation of Christians. She was one of the band's vocalists, along with Viona Paays, Franky Sihombing (who also played bass guitar), and later Sydney Mohede, when he joined the group on the second album. In 1992 the name was changed to VOG, Voice of Galilea, before it changed again to Voice of Generation when they made their second album, Tutur kata. Though she did not win, she became very motivated to sing.ДЄbout two years later Sari and her colleagues created a music band named Ezra. She was encouraged by her parents to take part in singing contests such as Cipta Pesona Bintang and Asia Bagus. She began to sing in 1990 when she was in senior high school. As her father worked at Pertamina, Sari was raised in five different cities in Indonesia, including Semarang, Makassar, and finally Jakarta, where she finished her high school education. Sari Simorangkir was born in Semarang to Batak parents D.N.

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