[7] He needed to put this into a song, and after listening to Sergei Rachmaninoff's 2nd piano concerto, a piece famously used to underscore the 1945 British film Brief Encounter, he adapted the melody of its second movement to write the verse.

[7] Rachmaninoff's music was in the public domain in the United States at that time, so Carmen thought no copyright existed on it, but it was still protected outside the U.S. subsequent to the release of the album.

[8] An agreement was reached in which the estate would receive 12 percent of the royalties from "All by Myself" as well as from "Never Gonna Fall in Love Again", which was based on the third movement from Rachmaninoff's Symphony No.

[7] Carmen performed "All by Myself" and his follow-up hit, "Never Gonna Fall in Love Again", on The Midnight Special television program on July 23, 1976 (season 4, episode 37).

During an interview on Watch What Happens Live with Andy Cohen, Dion revealed that the famous high note (F5) leading into the key change had not been planned but David Foster surprised her with it when she appeared for recording.

[41] Entertainment Weekly editor Chuck Eddy said, "But only in her desolate cover of Eric Carmen's 'All by Myself' does she truly crash through the glass ceiling of passion".

"[43] Dave Sholin from the Gavin Report commented, "Demand by both programmers and the public for this rendition of Eric Carmen's 1976 smash made it the obvious choice to be the third single lifted off Celine's multi-platinum and Grammy-nominated album, Falling into You".

[44] Kevin Courtney from Irish Times said, "It's probably a good thing that Celine is all by herself people in the room with her might have their eardrums shattered by her climactic, over the top delivery.

"[45] A reviewer from Music Week gave it top score with five out of five, stating that "Dion does a great job with the Eric Carmen power ballad and this one could be in for a long run given its guaranteed appeal to once-a-year record buyers.

[48] The New York Times editor Stephen Holden stated that the cover, along with "Because You Loved Me", "are the strongest cuts on an album crammed with formulaic romantic bombast".

[51] Christopher Smith from TalkAboutPopMusic wrote, Only a few vocalists could possibly attempt to do justice to Eric Carmen's 1975 classic, but with her out-of-this-world voice, Celine is one of them and perhaps the only one big enough to lift the song's long and emotional chords at the end.

Bring on the orchestra, drums and guitar as they prove no match for Celine as she repeats the song's central line again and again "don't wanna be, all by myself".

[102] In 2018, a cover by Ghian Wright, renamed to "I'm All Alone (Belter Version)", was used in the science fiction television series The Expanse, in the episode of season 3 "Delta-V".

The film contains this song in its opening scenes, with the protagonist Pamela Drury (Rachel Griffiths) taking a bubble bath and dissatisfied with her lonely life unknowingly or unintentionally wants to shoot herself in the head with a hair dryer.