It was written by Jorge A. Diaz, Édgar Barrera, Alejandro Borrero, Gomez, Abner Cordero Boria, Tainy, Ivanni Rodríguez, Alberto Carlos Melendez, Elena Rose, Alejandro, and Christopher Carballo Ramos, while the production was handled by NEON16, Jota Rosa, Albert Hype, and Tainy.

The track received widely positive reviews from music critics, who complimented its danceable and catchy rhythm and the singers' vocals.

[2] Various murals were spotted in Mexico, stating the song titles "De Una Vez" and "Baila Conmigo", generating speculation amidst fans and mainstream media that Gomez would be releasing Latin music soon.

"[11] On January 29, 2021, "Baila Conmigo" was released for digital download and streaming by Interscope Records as the second single from the EP,[12] marking the first collaboration between Gomez and Alejandro.

[13] It was a really interesting song for me to work on with Selena, since it fuses an authentic reggaeton sound with elements like the plucked electric guitar that lean more pop.

The lyrics include, "Bebé, no sé si hablas mucho español / Si entiendes cuando digo 'mi amor' / Comernos sin entendernos, es mejor / Solo tenemos que gustarnos" ("Baby, I don't know if you speak a lot of Spanish / If you understand when I say 'my love' / Devouring each other without understanding each other is better / We only have to like each other").

[16] Carolyn Twersky of Seventeen wrote that the track will "definitely have you up and dancing",[22] while Josh Mendes from Monitor Latino desrcribed it as "catchy" due to its "musical structure".

[18] Writing for We Are Mitú, Lucas Villa described the chemistry between Alejandro and Gomez in the track as "tangible", and called them a "dream team that we didn’t know we needed.

"[15] In his review for Rolling Stone, he stated that "Gomez playfully channels the criticism that she's not fluent in Spanish into a red-hot moment on the EP" in "Baila Conmigo".

[24] Also from Rolling Stone, Ernesto Lechner ranked the track as the Alejandro's 50th-best song and named it "a cure for post-pandemic isolation".

[11] In Canada, "Baila Conmigo" debuted and peaked at number 68 on Billboard's Canadian Hot 100 on the chart issue dated February 13, 2021, earning Alejandro his first entry.

It peaked at number one in Argentina, Ecuador, Panama, Paraguay, Puerto Rico, and Venezuela,[55][56] and reached the top 10 in Bolivia,[57] Costa Rica,[58] El Salvador,[59] Latin America,[60] Mexico,[61] Peru,[62] and Uruguay.

[64][65][66] A music video for "Baila Conmigo" premiered alongside the track's release on January 29, 2021, and was directed by Brazilian filmmaker Fernando Nogari.