Amaia Romero Arbizu (born 3 January 1999), known mononymously as Amaia, is a Spanish singer-songwriter, pianist and actress. After participating in many talent shows, she gained national recognition after winning series nine of musical television contest Operación Triunfo, later representing Spain alongside fellow competitor Alfred García at the 2018 Eurovision Song Contest with "Tu Canción". Romero later signed with Universal Music and released her debut album Pero No Pasa Nada in 2019.

Romero was born on 3 January 1999 in Pamplona, Navarre.

Daughter to Ángel Romero and Javiera Arbizu, Amaia belongs to a family of musicians. Her uncle, Joaquín Romero, was the manager of the Orfeón Pamplonés concert choir from 2008 until 2016, as well as the Pablo Sarasate Orchestra for two years. It was her uncle who discovered that, even as a child, Amaia had absolute pitch.

On her mother's side, Amaia is the niece of Carmen Arbizu, professor of singing at the Conservatorio Superior de Música de Navarra since 1990. Amaia started studying for a degree in piano at this conservatory and completed her musical studies at the Conservatori Superior de Música del Liceu, in Barcelona, in 2019.

Romero debuted in television in 2009 when she appeared on TVE's television news playing the piano at age ten as part of a children talent contest, where she ended third in her instrument's category. Romero participated in the televised talent show Cántame Una Canción on Telecinco, where she sang alongside David Civera and Sergio Rivero a year later. In 2011, she was the winner of a scholarship to Rock Camp 2011, and participated in the camp in 2011 and 2012. In 2012, she took part in series one of the talent show El Número Uno. She was eliminated in week six of the series. The jury in the show was made up of David Bustamante, Ana Torroja, Miguel Bosé, Natalia Jiménez and Mónica Naranjo. Romero and Naranjo would meet again on series nine of Operación Triunfo, as Naranjo went on to be part of the jury. In 2012 she also met Felipe VI and Letizia Ortiz, who would become King and Queen consort of Spain. They both told Amaia that she "had a future" after they saw her perform in Pamplona with the Pablo Sarasate Orchestra.

In 2016, Amaia collaborated with the Navarrese band Lemon y Tal on the song "Cicatrices de mi realidad".

In July 2017, Amaia auditioned in Bilbao for the revival series of the reality television music competition Operación Triunfo. On 23 October 2017, she was selected to enter the show's "academy" on the season premiere. After performing David Bowie's "Starman", Amaia was not selected by the show's jury, but was saved by the academy's staff of teachers instead. In January 2018, Amaia became a finalist in the competition after being awarded a perfect score of 40 points from the jury –the highest score in the history of the competition–. Distinguished for her naivety, diverse musical taste and humor, she was proclaimed the winner of the series with 46% of the final votes from the public. After her win, she signed a pre-contract with Universal Music. Romero consequently co-headlined an indoor arena tour with her fifteen talent show companions during 2018. 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. It was attended by 300,000 people.

Additionally, due to being one of the final five finalists on Operación Triunfo, Amaia was a candidate to represent Spain in the Eurovision Song Contest 2018. For the special Eurovision selection show that was held on 29 January 2018, she was allocated three songs: "Camina", which she performed as part of a group made up of the five finalists; "Al Cantar", which she performed solo; and "Tu Canción", composed by Raul Gómez and Sylvia Santoro, which she sang as a duet with her then-boyfriend Alfred García. The latter was selected with 43% of the public vote, representing the country in the 2018 contest, held in Lisbon, Portugal. Amaia and Alfred were the second to perform at the Eurovision final. They placed twenty-third out of the 26 participating countries with 61 points: 43 from the professional juries and 18 from the televote. After being asked about the result she stated "its a shit, but we are happy".