1 is the debut studio album by American singer Romeo Santos, released on November 8, 2011, by Sony Music Latin.

It is Santos's first album as a solo artist following the break-up of American bachata group Aventura, of which he was the lead singer.

It features several Anglophone and Hispanophone guest artists including Usher, Tomatito, Mario Domm, and Lil Wayne.

Recording for the album took place in 2011 at The Castle, Fight Klub, and EMG Studios in New York City.

A deluxe edition of the album containing five extra tracks was released exclusively in Walmart retail stores in the United States.

Six singles were released from the record, four of which, "You", "Promise", "Mi Santa", and "La Diabla", reached number one on the Billboard Hot Latin Songs chart in the U.S. Romeo Santos began his career as the lead member of Aventura, an urban bachata infused band.

[6] The third song, "Que Se Mueran" ("Let Them Die"), attacks the public for their criticism of the age difference between lovers.

[8] "Mi Santa" ("My Saint") incorporates elements of bachata and flamenco, and features Spanish guitarist Tomatito.

[9] "Promise" is a bilingual bachata tune that features American singer Usher and was produced by Rico Love.

[3][12] "Magia Negra" ("Black Magic") is a mixture of bachata and hip hop music, and features Spanish rapper Mala Rodríguez.

"All Aboard" is a hip hop track, featuring American rapper Lil Wayne and produced by Rico Love.

[20][23][24] The fourth single, "All Aboard", was released on March 8, 2012,[27] and peaked at number eight on the Latin Digital Songs chart.

[49] Santos announced that he would start the second leg of the tour on February 14, 2013, at the José Miguel Agrelot Coliseum in San Juan, Puerto Rico.

[52] Thorn Jurek of Allmusic gave the album a positive review, and called "You" an "easy summertime groove" and "Promise" a "shimmering duet".

[53] He said the production of the album "gives everything vivid colors and gauzy textures",[53] but that some songs—including the duets "Magia Negra," with Mala Rodríguez and "Rival" with Mario Domm—were "less-than-convincing detours", describing the former as a "throbbing EDM" and the latter as "treacly power balladry".

[53] Sarah Godfrey of the Washington Post gave the album a favorable review, admiring Santos for appealing to the Anglophone market without the need to "sell out bachata die-hards", citing "Promise" as the main example.

[56] Godfrey said Santos retains his style on the duet "All Aboard", and that the collaborations were "obviously meant to pull in folks who’ve never heard of Aventura".

[62] At the 25th Lo Nuestro Awards in 2013, the record was nominated for Tropical Album of the Year, but lost to Phase II by Prince Royce.

[67] As part of a deal with Walmart, a deluxe edition containing five extra tracks—the English version of "Promise", Spanish and English versions of "Aleluya", featuring American rapper Pitbull, "Malevo", and "Vale la Pena el Placer"—was released for sale exclusively at Walmart outlets.

[69] A limited edition 3 disc dual sided vinyl collection of the album was also released for sale exclusively at Target stores.

[71][72][73] 65,000 copies were sold in its first week, making it the biggest debut sales for a Latin album since El Cartel: The Big Boss by Daddy Yankee in 2007.