Complex sentence: Rivers Cuomo (born June 13,1970) is an American musician, singer and songwriter best known as the lead vocalist, lead guitarist and principal songwriter of the alternative rock band Weezer.
Split into simpler sentences: Rivers Cuomo (born June 13,1970) is an American musician, singer, and songwriter. He is best known as the lead vocalist, lead guitarist and principal songwriter of the alternative rock band Weezer.