Robert Steven "Adrian" Belew (born December 23, 1949) is an American musician, singer, songwriter, and record producer. A multi-instrumentalist primarily known as a guitarist and singer, he is noted for his unusual and impressionistic approach to his guitar tones (which, rather than relying on standard instrumental tones, often resemble sound effects or noises made by animals and machines). Widely recognized as an "incredibly versatile player", Belew is perhaps best known for his long career as singer and guitarist in the progressive rock group King Crimson between 1981 and 2009. He has also released nearly twenty solo albums for Island Records and Atlantic Records in a range of blended or alternated styles including art rock, New Wave, Beatles-inspired pop-rock, progressive rock and experimental noise. In addition, Belew has been a member of the intermittently active pop band the Bears, and fronted GaGa in the late 1970s and early 1980s. Belew has worked extensively as a session, guest and touring musician, including periods with the Frank Zappa and David Bowie bands, Talking Heads, Laurie Anderson, and Nine Inch Nails, as well as contributing to hit singles by Paul Simon, Tom Tom Club, and others. He released a top-10 single in 1989 with "Oh Daddy", and his 2005 single "Beat Box Guitar" was nominated for a Grammy for Best Rock Instrumental Performance. Belew has also worked in instrument design and multimedia, collaborating with Parker Guitars to help design his Parker Fly signature guitar, and designing his own iOS mobile apps, "FLUX by belew" and "FLUX:FX, the multi-effect audio processor app."