What is the name of that band was part screamo and lead singer a guy with really long hair for some reason you thought it anberlin?

Underoath is the name of the band you're thinking of. They are a Christian metalcore band from Ocala, Florida. The band was formed in 1997 and has released eight studio albums, two live albums, two compilation albums, and two EPs. Underoath is one of the most successful Christian metalcore bands of all time, and they have been praised for their unique sound and powerful lyrics. The band's lead singer, Spencer Chamberlain, is known for his long hair, which he has worn for most of his career.