Olan is an Indonesian rock band that has been around for over two decades. They are known for their catchy melodies, powerful vocals, and energetic live performances. The band has released several albums and singles over the years, including "Hiasan," "Monk," "Memori Hit Lagenda Rock Olan," and "Hitam Manisan." Olan has toured extensively throughout Indonesia and has also performed at international festivals. They are one of the most popular rock bands in Indonesia and continue to be a force in the music scene.