For their presentations, which were held at Cemento, Sergi wrote the first song called "Imán", and received positive reviews, including from guitarist Leandro Fuentes.

[2] In 2001, Sergi teamed up with Gattas, Fuentes and Bruno de Vincenti to form Miranda!, labeling their style as melodramatic electropop.

[3] In November of the same year they released Es Mentira, their first album which would spawn five singles: "Bailarina," "Imán," "Tu Juego," "Agua" and "Romix."

Their presentations were described as "glamorous and melodramatic", and ranked them as "the most outstanding group of the Buenos Aires indie-electronic scene", receiving the nickname "the monster of the under".

[5] After their first appearance on MTV, they offered their first concert in a theater, at the Ateneo de Buenos Aires, with the special participation of singer Gustavo Cerati.

The album was released by the Secsy Discos label with the collaboration of Locomotion, mixed at Panda studios in Buenos Aires and mastered in Los Angeles, United States, by Tom Baker.

It was launched and presented on September 21 at the Ateneo de Buenos Aires, and due to high demand, they had to add one more show for that same day.

Sin Restricciones reached number 11 on the Mexican Album Chart and was certified Platinum in Argentina, Colombia and México.

[6] After the media diffusion throughout Latin America, they performed a concert at the Gran Rex theater in Buenos Aires, a presentation that was recorded to be edited on a DVD that came out months later under the name En Vivo Sin Restricciones, which included the majority of their songs plus a song that was never recorded in a studio, but that was part of their live performances during his early years, called "Salgamos".

El Disco de Tu Corazón was nominated for the 2007 Latin Grammy Awards in the Best Pop Album by a Duo or Group with Vocal category.

At the end of 2007 they published the live album El Disco de Tu Corazón + Vivo, which included two CDs: the first being the original recorded in the studio, and the second that include the twelve songs they performed on August 9 and 10 of that same year at the Gran Rex theater, with also the remixed versions of "Perfecta" (with the voice of Juliana Gattas instead of Julieta Venegas) and "Prisionero", and the video clips of "Prisionero", "Hola" (which was the theme song of the Argentine telenovela Lalola) and "Perfecta".

The record material was made up of a compiled CD that brought together the band's greatest hits, as well as two new songs: "Chicas" and "Mi propia vida", and a remix titled "Mirandamix", by DJ Deró.

[15] In August of the same year, they performed at the annual charity festival Un Sol Para Los Chicos at the Luna Park theater, being the main attraction of the night.

[16] "Mentía", released on June 22, 2009, was the first single from the band's fourth album, titled Miranda Es Imposible!, which was published by Pelo Music in August of that same year.

In December of the same year, they released Miranda Directo!, their fourth live album that included images of the band's presentation at the Gran Rex theatre on October 2, 2009.

In June 2011, coinciding with their tenth anniversary, the group revealed the name of their next album: Magistral, which would immediately be promoted with the second single titled "Ya Lo Sabía".

[21][22][23] In that same year Juliana Gattas and Alejandro Sergi were coaches for the Telefe talent show La Voz Argentina, Based on the reality singing competition The Voice of Holland.

At the end of 2012, they were in charge of putting music to the Argentine film "Caídos del mapa", with the song "Gran Amistad".

[26] On January 22, 2014, was confirmed that guitarist Leandro "Lolo" Fuentes would no longer be part of the band, so they continued the production of the album without him.

[27] Finally, the album Safari was published by Pelo Music on July 22, 2014, which was also preceded by the second single titled "Fantasmas", released on June 16.

[28][29] On January 24, 2015, they participated in the eleventh version of the Personal Fest festival together with Coti Sorokin, Illya Kuryaki and the Valderramas, Maxi Trusso and Close.

[30] The same year Sergi and Gattas are called to be juries in Elegidos, la música en tus manos on the Telefe network.

[31] At the same time, Sergi, together with Cachorro López, Julieta Venegas and Didi Gutman, forms another alternate group to Miranda!

[39] On April 21, 2017, Fuerte was finally published, produced by Cachorro López and Alejandro Sergi, this being the first record material released under the Sony Music label.

[58] A new version of "Don", alongside singer Ca7riel, released on August 25, 2022, served as the lead single of the album, and peaked at number 40 on the Argentina Hot 100.

[60] "Yo Te Diré", the third single, also original from the album Sin Restricciones, with Lali Espósito, was released on January 20, 2023, and reached number 26 on the Argentine chart.

[66] The track peaked at number 8 on the Billboard Argentina Hot 100, being the band's first song to reach the top ten of the chart in that country.