"All by Myself" is a song by American singer-songwriter Eric Carmen, released by Arista in December 1975 as the first single from Carmen's debut album, Eric Carmen (1975). The verse is based on the second movement of Sergei Rachmaninoff's 1900–1901 Piano Concerto No. 2 in C minor, Opus 18. The chorus was taken from the song "Let's Pretend", which Carmen wrote and recorded with the Raspberries in 1972. The slide guitar solo was performed by studio guitarist Hugh McCracken.

Eric Howard Carmen was an American singer-songwriter and multi-instrumentalist. He was the lead vocalist of the Raspberries, with whom he recorded the hit "Go All the Way" and four albums. He embarked on a solo career in 1975 and had global success with "All by Myself", "Never Gonna Fall in Love Again", "She Did It", "Hungry Eyes", and "Make Me Lose Control". In later years, he toured with Ringo Starr & His All-Starr Band before reforming the Raspberries in 2004.