Extreme are an American rock band formed in Boston, Massachusetts, in 1985, that reached the height of their popularity in the late 1980s and early 1990s. They have released six studio albums, two EPs (in Japan) and two compilation albums since their formation. The band was one of the most successful rock acts of the early 1990s, selling over 10 million albums worldwide. Extreme achieved their greatest success with their 1990 album Pornograffitti, which peaked at number 10 on the Billboard 200, and was certified gold in May 1991 and double platinum in October 1992. The album featured the acoustic ballad single "More Than Words", which reached No. 1 on the Billboard Hot 100 in the United States.