"El último adiós" (English: "The Last Goodbye") is a song written by Peruvian singer Gian Marco and Cuban American musician and producer Emílio Estefan to commemorate the September 11 attacks and support the families of the victims.

[1] Proceeds of the recording went to the American Red Cross and the United Way.

[2] This version of the song was released both as a stand-alone single, and as part of a four-song special EP by the same name.

[3] Gian Marco also recorded a solo version of the song, which was considered one of his standout pieces during his international debut.

[4] In the four minutes of the song, a variety of musical genres can be heard, and over 120 different artists were involved in the project,[5] including Ricky Martin, Christina Aguilera, Jennifer Lopez, Shakira, Paulina Rubio, Thalía, Chayanne, Alejandro Sanz, José José, Ivete Sangalo, Luis Fonsi, Ana Bárbara, Juan Luis Guerra and Gloria Estefan.