All by myself

"All by Myself" is a power ballad written and performed by Eric Carmen in 1975.
The verse borrows very heavily from the second movement (Adagio Sostenuto) of Sergei Rachmaninoff's Piano Concerto No. 2 in C minor, Opus 18, which Carmen believed was in the public domain. Having found it was not, only after the record had been issued, Carmen had to come to an agreement with the Rachmaninoff estate.