Nuno Duarte Gil Mendes Bettencourt (born September 20, 1966) is a Portuguese American guitarist, singer-songwriter, and record producer. He is best known for his role as the lead guitarist of the Boston rock band Extreme.
He has since recorded a solo project called Schizophonic as well as with bands he founded including Mourning Widows, Population 1, DramaGods, The Satellite Party (headed by Jane's Addiction's then-former frontman and Lollapalooza co-founder Perry Farrell), and then reunited with Extreme to record new music and tour.
Since 1990, Bettencourt has had his own line of custom guitars designed by Washburn Guitars. His line is known as the N-Series, and is currently promoting the Washburn N4.