
"Calling Occupants of Interplanetary Craft" is a ballad by Klaatu, originally released in 1976 on their first album 3:47 EST. The song would open night transmission of the pirate radio station Radio Caroline. The year following its release, the Carpenters covered the song, using a crew of 160 musicians. The Carpenters' version reached the top 10 in the UK and Canada, and charted at number 1 in Ireland.

"Come Sail Away" is a song by American progressive rock group Styx, written and sung by primary singer and songwriter Dennis DeYoung and featured on the band's seventh album The Grand Illusion (1977). Upon its release as the lead single from the album, "Come Sail Away" peaked at #8 in January 1978 on the Billboard Hot 100, and helped The Grand Illusion achieve multi-platinum sales in 1978. It is one of the biggest hits of Styx's career.

"E.T." is a song by American singer Katy Perry from her third studio album, Teenage Dream (2010). She co-wrote the song with its producers Dr. Luke, Max Martin, and Ammo. "E.T." was serviced to radio stations as the album's fourth single on February 16, 2011. One version of the song features verses from American rapper Kanye West. Musically, it is an electronic and hip hop ballad which draws heavily from dubstep and techno, along with smaller amounts of drum and bass. According to Perry, the song lyrically speaks of "falling in love with a foreigner".

"Hangar 18" is a song by American thrash metal band Megadeth from the 1990 album Rust in Peace. UFO conspiracy theories, or possibly Hangar 18, the 1980 film based on those theories, inspired drummer Nick Menza to write the lyrics. Shortly thereafter, frontman Dave Mustaine composed the bulk of the music. The intro is a rapidly strummed version of the D minor arpeggio that Mustaine wrote for the Metallica instrumental track "The Call of Ktulu", which was the final Metallica song for which he was given writing credit. Hangar 18 is located at Wright-Patterson Air Force Base near Dayton, Ohio, and it is speculated that an alien aircraft was brought there from Roswell in 1947. The song reached number #25 on the Irish Singles Chart, also reached number #26 on the UK Singles Chart.

"Hometown Unicorn" is the debut single by Super Furry Animals, released on Alan McGee's Creation Records label on 26 February 1996. It reached #47 in the UK Singles Chart and was voted as "Single of the Week" in NME.

Caribou is the eighth studio album by English singer Elton John, released in 1974. It was his fourth chart-topping album in the United States and his third in the United Kingdom. The album contains the singles "Don't Let the Sun Go Down on Me", which reached number 16 in the UK Singles Chart and number two in the US, and "The Bitch Is Back", which reached number 15 in the UK and number four in the US. Both singles reached number one in Canada on the RPM 100 national Top Singles Chart, as did the album itself.

"Let There Be More Light" is the opening track on Pink Floyd's second album, A Saucerful of Secrets. It was also released in edited form as the fourth American single by the group.

"Love Walks In" is a song by American hard rock band Van Halen released as the third single from the band's seventh studio album, 5150 (1986). It was the first song the band wrote with vocalist Sammy Hagar, and it is about aliens. It peaked at number 4 on the US Billboard Mainstream Rock Songs chart, and reached number 22 on the Billboard Hot 100.

"Mr. Spaceman" is a song by the American rock band the Byrds and was the third track on their 1966 album, Fifth Dimension. It was released as the third single from the album in September 1966, reaching number 36 on the Billboard Hot 100, but failing to chart in the United Kingdom. Upon its release as a single, the music press coined the term "space-rock" to describe it, although since then, this term has come to refer to a genre of rock music originating from 1970s progressive and psychedelic music.

"Nobody Told Me" is a song by John Lennon. The B-side features Yoko Ono's "O' Sanity"; both are on the Milk and Honey album. The promo video for the single was made up of clips of footage from Lennon's other videos, as are most posthumous Lennon videos.

"Starman" is a song by English musician David Bowie. It was released in April 1972 by RCA Records as the lead single of his fifth studio album The Rise and Fall of Ziggy Stardust and the Spiders from Mars. Co-produced by Ken Scott, Bowie recorded the song on 4 February 1972 at Trident Studios in London with his backing band known as the Spiders from Mars – comprising guitarist Mick Ronson, bassist Trevor Bolder and drummer Mick Woodmansey. The song was a late addition to the album, written as a direct response to RCA's Dennis Katz's request for a single; it replaced the Chuck Berry cover "Round and Round" on the album. The lyrics describe Ziggy Stardust bringing a message of hope to Earth's youth through the radio, salvation by an alien 'Starman'. The chorus is inspired by "Over the Rainbow", sung by Judy Garland, while other influences include T. Rex and the Supremes.

OK Computer is the third studio album by English rock band Radiohead, released on 21 May 1997 on EMI subsidiaries Parlophone and Capitol Records. The members of Radiohead self-produced the album with Nigel Godrich, an arrangement they have used for their subsequent albums. Other than the song "Lucky", recorded in 1995, Radiohead recorded OK Computer in Oxfordshire and Bath between 1996 and early 1997, mostly in the historic mansion St Catherine's Court. The band distanced themselves from the guitar-centred, lyrically introspective style of their previous album, The Bends. OK Computer's abstract lyrics, densely layered sound and eclectic influences laid the groundwork for Radiohead's later, more experimental work.

"UFO" is the sixth single by Japanese duo Pink Lady, released on December 5, 1977 on Victor Entertainment.