Title: It's the End of the World
Content:  The episode's title refers to the song "It's the End of the World as We Know It (And I Feel Fine)" by R.E.M., whose lead singer, Michael Stipe, collaborated with Coldplay frontman Chris Martin for a cover of the Joseph Arthur song "In The Sun", which closes the episode.
Title: It's the End of the World as We Know It (EP)
Content:  It's the End of the World as We Know It is the debut EP by American electro house musician Steve Aoki. It was released on December 11, 2012 through Dim Mak Records. The 3-track extended play includes five guest appearances from Angger Dimas, My Name Is Kay, Dan Sena, Miss Palmer, and Rune RK. All three songs eventually became singles and were released with remixes, except for the third and last track "Transcend"; a vocal version of the song, entitled "Bring You to Life (Transcend)", featuring vocals by RAS, was released instead.
Title: It's the End of the World as We Know It (And I Feel Fine)
Content:  "It's the End of the World as We Know It (And I Feel Fine)" is a song by American rock band R.E.M., which first appeared on their 1987 album Document. It was released as the album's second single in November 1987, reaching No. 69 in the US Billboard Hot 100 and later reaching No. 39 on the UK Singles Chart on its re-release in December 1991.
Title: It's the End of the World as We Know It (And I Feel Fine)
Content:  In 1992, the song was played repeatedly for a 24-hour period (with brief promos interspersed) to introduce the new format for WENZ 107.9 FM "The End", a radio station in Cleveland, Ohio. When the station underwent a new format change in 1996, they again played the song in 24-hour loop. There was a documentary film made about the station entitled The End of the World As We Knew It, released in 2009, which featured many of the former staffers and jocks. The song was featured in several satirical videos on YouTube, in connection with the prediction of radio pastor Harold Camping 
Title: The End of the World (Skeeter Davis song)
Content:  In 1990, English singer Sonia covered "End of the World". The fifth and final single from her debut album, Everybody Knows, it reached number 18 in the UK, the same chart position as the original. The single's B-side "Can't Help the Way That I Feel" also appeared on Sonia's debut album. This was her final single with Stock Aitken Waterman.
Title: The End of the World (Skeeter Davis song)
Content:  "The End of the World" is a pop song written by composer Arthur Kent and lyricist Sylvia Dee, who often worked as a team. They wrote the song for American singer Skeeter Davis, and her recording of it was highly successful in the early 1960s, reaching the top five on four different charts, including on the main Billboard Hot 100. It spawned many cover versions.
Title: Not the End of the World (song)
Content:  "Not the End of the World" was written by Katy Perry, Michael Pollack, Madison Love, Jacob Kasher Hindlin, and Andrew Goldstein. Production has been held by Oscar Görres and Goldstein, which also held track's instrumentation with keyboards and programming. It is a trap-pop  song with disco beat and is written in the key of D minor. The track starts off with chorus, after which there is a drop. The song's lyrics talk about how harsh criticism isn't the "end of the world", and the song includes a melody from Steam's 1969 single "Na Na Hey Hey Kiss Him Goodbye" in pre-choruses and at the end of the track.
Title: It's the End of the World as We Know It (And I Feel Fine)
Content:  song along with a lot of stuff I'd seen when I was flipping TV channels. It's a collection of streams of consciousness." The song originated from a previously unreleased song called "PSA" ("Public Service Announcement"); the two are very similar in melody and tempo. "PSA" was itself later reworked and released as a single in 2003, under the title "Bad Day". In an interview with Guitar World magazine published in November 1996, R.E.M. guitarist Peter Buck agreed that "End of the World" was in the tradition of Bob Dylan's "Subterranean Homesick Blues". The song was included on the 2001 Clear Channel memorandum of songs thought to be "lyrically questionable" after the September 11 terrorist attacks.
Title: It's the End of the World as We Know It (And I Feel Fine)
Content:  Family Radio, that the world would end on May 21, 2011. Also, before the supposed Mayan apocalypse on December 21, 2012, sales for the song jumped from 3,000 to 19,000 copies for the week. Alternative radio station CFEX-FM in Calgary, Alberta, Canada, stunted by playing the song all day on December 21, 2012, interspersed with "Get to Know a Mayan" and "Apocalypse Survival Tips" segments. Amid the global COVID-19 pandemic, the song received an increase in downloads and streaming in March 2020 alongside other apocalypse- and sickness-themed songs. Online downloads of the song rose 184 percent, while streams rose 48 percent.
Title: The End of the World (The Cure song)
Content:  "The End of the World" is a song by English rock band the Cure. It was the first single to be released from their 12th studio album, The Cure (2004), and reached the top 40 in Italy and the United Kingdom.

Question: who sang the end of the world as we know it?
Answer: R.E.M.