Robert Dunlap[1] Blue (1946[2] – January 22, 1998[3]) was a painter noted for his images of pin-up girls in the 1980s and later his cowgirls of the New West series. He was the son of comedic actor Ben Blue.[1] Blue's work precedes that of Patrick Nagel, as Blue's credits as a commercial artist date as early as 1970. A Blue painting was used for the album back cover art for Iron Butterfly "Metamorphosis" 1970 LP release[citation needed] and he painted fetish pin-ups of icon Bettie Page on canvas as early as 1974, which were collected by the "Pin-up King" Charles G. Martignette.[citation needed] (Martignette is co-author of The Great American Pin-Up with Louis K. Meisel). Other notable collectors of Blue's art have included Jack Nicholson, Barbra Streisand, Brian Wilson and Hugh Hefner, as well as numerous corporate collectors, including the Hyatt Regency Hotel in Los Angeles, and the Atlanta Hilton Motel.[citation needed] Blue's paintings are in the National Archives in Washington D.C. and the permanent collection of the Carnegie Art Museum.[citation needed]