"No Sé Olvidar" (English: "I Don't Know How to Forget") is a song written by Kike Santander and performed by Mexican recording artist Alejandro Fernández. It was co-produced by Santander and Emilio Estefan and was released as the third single from Me Estoy Enamorando by Sony Music Mexico in 1997. The song is a bolero-pop ballad with ranchera influences and portrays the singer desperately trying to forget his lover. A music video was made for the track which features Fernández hopelessly attempting to not remember his lover only to slowly delve into insanity. It received a nomination for Video of the Year at the 1998 Lo Nuestro Awards.