The members changed their band name to "Sheila On 7": the "on 7" referring to the seven-note solfège, while "Sheilagank" became the name of their fanbase. Sheila On 7 since its beginning in the Indonesian music scene has made a lot of achievements, including being the only Indonesian band that is able to sell physical albums for more than one million copies, three albums in a row. Through the success of the debut album Sheila On 7 (1999), followed by two other albums that exploded in the market, Kisah Klasik Untuk Masa Depan (2000), 07 Des (2002). in 2003, they released their first film soundtrack Ost. 30 Hari Mencari Cinta which succeeded sold over 600.000 copies and followed by their forth studio album Pejantan Tangguh in 2004, although not as successful as the first three albums where sales reached millions, this album was able to sell more than 450,000 copies. Because of that success, they also have loyal listeners in neighboring countries such as Malaysia, Singapore and Brunei. On 18 October 2004, Anton was dismissed from the band management due to disciplinary issues while Brian filled Anton's position. Brian performed with Sheila On 7 in different promo tours for the album "Pejantan Tangguh". "The Very Best of Sheila On 7: Jalan Terus" (2005) album became the first studio recording release after the drummer replacement. In 2006, Sakti left the band amidst recording "507" as he was to continue his studies in Pakistan and this did not gel with their schedule. it was during this time that Brian was promoted as their permanent drummer until now. On 26 January 2018, Sheila on 7 released their first single entitled "Film Favorit" under their own label named 507 Records. It also be their first time to involves music directors for working on their song.. "Film Favorit" itself is a song created by guitarist Eross, which inspired the story of a close friend who has not managed to find a life partner. Their musical style is deemed difficult to determine though it is still in the pop rock genre, but it is clear that they are believed to play a "Sheila music", where ideas or creations for their songs emerge spontaneously, hence the simple lyrics and musical concepts. Sheila on 7 tend to compose upbeat and optimistic songs that reflect the bliss of being teenagers and young adults.