Extreme is an American rock band that achieved popularity in the late 1980s and early 1990s. Some of Extreme's influences, Queen and Van Halen (the latter of which Gary Cherone would eventually join and later leave), are easily apparent from their music's multi-part vocal harmonies and electric guitar tone and instrumental techniques. The band lends the listener a sound that blends the genre of glam metal with the shredding guitar work from thrash metal. Being asked about their style, Extreme categorized their music as 'Funky Metal'.   Wikipedia