"Horse Latitudes" is the fifth song from The Doors second album, "Strange Days".
 The song is a spoken word piece by Jim Morrison with the band providing spooky noises as a backdrop.
 Morrison speaks the lyrics, telling of a ship at sea forced to jettison the onboard horses to lighten its load.
 The words are taken from one of the first poems Jim Morrison wrote, inspired by a book cover he saw at a local bookstore as a child.
An American Prayer is the ninth and final studio album by the Doors.
 In 1978, seven years after lead singer Jim Morrison died and five years after the remaining members of the band broke up, Ray Manzarek, Robby Krieger, and John Densmore reunited and recorded backing tracks over Morrison's poetry (originally recorded in 1969 and 1970).
 Other pieces of music and spoken word recorded by the Doors and Morrison were also used in the audio collage, such as dialogue from Morrison's film "" and snippets from jam sessions.
The Doors is a 1991 American biographical film about the 1960–70s rock band of the same name which emphasizes the life of its lead singer, Jim Morrison.
 It was directed by Oliver Stone, and stars Val Kilmer as Morrison and Meg Ryan as Pamela Courson (Morrison's companion).
 The film features Kyle MacLachlan as Ray Manzarek, Frank Whaley as Robby Krieger, Kevin Dillon as John Densmore, and Kathleen Quinlan as Patricia Kennealy.
Wilderness: The Lost Writings of Jim Morrison is a book of poems by Jim Morrison.
No One Here Gets Out Alive (1980) was the first biography of Jim Morrison, lead singer and lyricist of the L.A. rock band The Doors, written nearly a decade after Morrison's death by journalist Jerry Hopkins, with "insider" information added by Danny Sugerman.
 Hopkins had done an extensive interview with Morrison before his death, but his first manuscript was rejected by major publishers.
 Sugerman began working as an assistant in the Doors office at the age of 13, and became their manager after Morrison died (replacing Bill Siddons).
James Douglas Morrison (December 8, 1943 – July 3, 1971) was an American singer, songwriter, and poet, best remembered as the lead singer of the Doors.
 Due to his poetic lyrics, distinctive voice, wild personality, performances, and the dramatic circumstances surrounding his life and early death, Morrison is regarded by both music critics and fans as one of the most iconic and influential frontmen in rock music history.
Jón Þór "Jónsi" Birgisson (] ) (born 23 April 1975) is the guitarist and vocalist for the Icelandic post-rock band Sigur Rós.
 He is known for his use of a cello bow on guitar and his falsetto or countertenor voice.
 He is blind in his right eye from birth as a result of a broken optic nerve from the brain.
 He is openly gay.
 Apart from Sigur Rós, Jónsi also performs together with his partner Alex Somers as an art collaboration called Jónsi & Alex.
 They released their self-titled first book in November 2006, which was an embossed hardcover limited to 1000 copies, along with their first album, "Riceboy Sleeps", in July 2009.
"Strange Days" is a song by The Doors.
 It was released in 1967 and is the first track on the album of the same name.
 According to a review at Allmusic by Tom Maginnis, the song seems to find lead singer Jim Morrison "pondering the state of the then emerging hippie youth culture and how they are perceived by mainstream or 'straight' society."
 A visit to New York City by The Doors inspired Jim Morrison to write "Strange Days" and other songs on the "Strange Days" album, the band's second.
The Doors were an American rock band formed in 1965 in Los Angeles, with vocalist Jim Morrison, keyboardist Ray Manzarek, guitarist Robby Krieger, and drummer John Densmore.
 The band got its name, at Morrison's suggestion from the title of Aldous Huxley's book "The Doors of Perception", which itself was a reference to a quote made by William Blake, "If the doors of perception were cleansed, everything would appear to man as it is, infinite."
 They were unique and among the most controversial and influential rock acts of the 1960s, mostly because of Morrison's lyrics and charismatic but unpredictable stage persona.
 After Morrison's death in 1971 at age 27, the remaining members continued as a trio until disbanding in 1973.
The Jim Morrison Triptych is an oil painting by American artist T. E. Breitenbach (best known for his painting "Proverbidioms").
 It is a so-called "lost" collaboration with Jim Morrison of The Doors, intended for use on Morrison's "An American Prayer" album, and completed shortly before Morrison's death.

Question: Are Jim Morrison and Jónsi both rock music singers?
Answer: yes