[8] Romero participated in the televised talent show Cántame Una Canción on Telecinco, where she sang alongside David Civera and Sergio Rivero a year later.

The tour (named OT 2017 en concierto) began on 3 March 2018 at the Palau Sant Jordi and ended ibid on December 28 of that same year, comprising 23 concerts.

She relocated to the Eixample district in Barcelona and there she completed her degree in classical piano in 2019 at the Conservatori Superior de Música del Liceu.

[26][7] Amaia also toured Spain with The Free Fall Band throughout 2018, visiting Madrid, Pamplona, Sitges and the Primavera Sound music festival.

Its lead single "El Relámpago" was released on digital platforms in May 2019, peaking at number 24 on the PROMUSICAE chart and staying on the list for over three weeks.

[36] A limited hard CD and LP version was released alongside the promotional single "Nadie Podría Hacerlo" for Record Store Day.

Pero No Pasa Nada saw light on 20 September 2019, topping the Spanish albums chart in its debut week despite receiving mixed reviews.

[40][41] The singer parallelly participated in the third season of Spanish Netflix series Paquita Salas covering the jota "Tan Pequeñica Y Sincera" by Marisol, which premiered on Spotify on September 19.

[45][46] In August 2020, two self-written songs "Cosas Interesantes Para Decir" and "La Victoria" were released online as promotional singles recorded in a lo-fi studio in Barcelona to close this musical era.

[47] On 1 May 2020 Amazon Prime Video premiered Una Vuelta Al Sol, a documentary film that shows the making of the album as well as a brief look into the tour.

In October 2020, Amaia collaborated with Alizzz on his song "El Encuentro", which met great commercial success and won the Premio MIN for Best Urban Recording.

[49][50] Alizzz would serve as the key producer for the singer's upcoming studio album Cuando No Sé Quién Soy, whose lead single "Yo Invito" was released a year later to critical and popular acclaim.

"Yamaguchi", a folk song about childhood and growing up that references the Pamplona park and the Japanese city of the same name, was released in January 2022 as its third single.

She chose her birthday to pay tribute to her favorite place, Yamaguchi Park, in her hometown of Pamplona, in the form of a modern jota mixing melodic pop.