Back in 2021, Radio Vigo's Twitter account posted a poll asking their followers to vote for which artist they wanted to compose Celta's centenary anthem. The poll had four contenders, –Iván Ferreiro, Siniestro Total, Carlos Núñez Muñoz, and local duo Tony Lomba and Eladio. While scrolling through social media, C. Tangana saw the poll and replied to it, asking: "Can I Try?". Álvarez is of Galician descent and has been a life-long supporter of the team, having cited Aleksandr Mostovoi, as his favourite player,[4] even appearing at some Celta matches in his jersey.[4] Despite his staunch support for the team, his allegiance to the team was an object of debate, as the rapper was born in Madrid, and had built his artistic image around that fact.[5] Faced with criticism the musician stated: "If the fans don't want [me to do] it, I'll pass".[6]
After a year of speculation, Celta's president, Carlos Mouriño confirmed that the rapper had been contacted, but at the time did not yet reveal if he was ultimately chosen, however did confirm the idea of it being almost certain some time later.[7][8] In the summer of 2022, C. Tangana played a show in the city, and congratulated the team on its 99th anniversary, while on stage. In March 2023, a huge banner was hung in the city centre, featuring Alvarez's "Can I Try?" tweet, finally confirming his involvement.[9]
On the same day that his participation was confirmed, the musician arrived in Vigo and spent two weeks in the region, to better understand Traditional Galician Music. To do so he contacted many local folk artists, among the names who helped him are Rodrigo Romani, Pedro Feijoo and Alfredo Dourado. From many national ideas that were incorporated the artist believes that the most important ones were the incorporations of the pandeireteiras and cantareiras (both groups of female singers, with the former, such as Lagharteiras, using tambourines). "This combination of female voices, always in a choir, almost never as soloists, playing percussion, all together, for me is the most moving thing there is musically in the whole world," Álvarez says.[1]
The lyrics are written entirely in Galician, and are strongly influenced by the culture of the region, Vigo, and the club. The mentions of blue and light blue represent the main colour of the sky-blue team and the Galician flag. The lyrics also reference the Ondas do mar de Vigo poem almost citing it. The repeating phrase of "Un escudo no meu peito" also comes from a local text, although a more modern one, being from the Keltoi! song 1923. That song is unofficially considered to be the anthem of the club. The title itself refers to the Coat of arms of Vigo and the team's centenary.[10]