After signing with the label Sony Music Latin and management company WK Entertainment, Mernes found commercial success.

She released her pop and urban debut studio album Tú Crees en Mí?, certified Platinum by the CAPIF.

In 2023, Emilia earned her first number-one singles on the Argentina Hot 100 with "En la Intimidad", along Big One and Callejero Fino, and "Los del Espacio", as part of the supergroup of the same name.

Born and raised in Nogoyá, Entre Ríos, Emilia's devotion to music began when she was just 12 years old and her grandfather gave her a guitar.

As the band's primary vocalist, together with Fer Vázquez, they released the singles "Cuando se Pone A Bailar", "Sentí el Sabor", "Una y Otra Vez", Besarte," and "Que Rico Baila".

[4] In 2019, after signing a contract with WK Entertainment and Sony Music Latin,[5] home of superstars acts such as Maluma, Wisin, CNCO, Carlos Vives and Prince Royce, Emilia released her debut single "Recalienta", which peaked at number 68 on the Billboard Argentina Hot 100.

[6] In August 2019, she released along with Darell the single "No Soy Yo", whose video is starring Joel Pimentel from CNCO, Oriana Sabatini and Johann Vera.

[9] On 28 November 2019, was released the song "Boomshakalaka", in which she is featured, with Dimitri Vegas & Like Mike, Afro Bros, Sebastián Yatra and Camilo.

On 14 August, Mernes released a remix of the song, titled "Já É Tarde (No Más)", with the Brazilian singer Bianca and producer Cabrera.

[15] On 15 October, she released "Bendición" along with Puerto Rican singer Álex Rose, with a home video clip recorded as a result of the COVID-19 pandemic.

[18] The lead single of her first studio album, "Como Si No Importara", with Argentine rapper Duki, was released on 13 July 2021.

Between November and December, Mernes released the standalone singles "BB", her second collaboration with MYA, and "De Enero a Diciembre", with Rusherking.

In the year, she also was featured in five singles: "Esto Recién Empieza", with rapper Duki, "Diva", with Princess Nokia, "Q-Lito", with Sael, "Quieres", with Aitana and Ptazeta, and "El Plan", with Rusherking and L-Gante.

[28] In the same month, Emilia participated in two other songs: the remixed version of "Uno los Dos" by Miranda!,[29] and "Tu Recuerdo" with Wisin and Lyanno.

[23] On 1 June, the song "Los del Espacio" was released, by the supergroup of the same name in which Mernes participates along with Lit Killah, Tiago PZK, María Becerra, Duki, Rusherking, Big One and FMK.

[34] The following month, her collaboration with FMK titled "Salgo a Bailar" was released, an Argentine cumbia and reggaeton song with lyrics about a story of separation and difficulties in getting over someone.