The Isley Brothers (pronounced /?a?zli?/; IZE-lee) are an American R&B, soul music and funk group. They have had notably long-running success on the Billboard charts, and are the only act to chart in the Top 40 in six separate decades. In 2006, their most recent release became their ninth album to reach the Top Ten of the Billboard 200. Over the years, the act has performed in a variety of genres, including doo-wop, R&B, rock 'n' roll, soul, funk, disco, urban adult contemporary and hip-hop soul. The group has gone through several lineups, ranging from a quartet to a trio to a sextet; they are currently a duo.