Rosalia Sairem is a Spanish singer, born in the city of Elche, next to the east coast, in Alicante.

She studied classical singing in the Professional Conservatory "Teresa Berganza" in Madrid with the professors Mr. Isidro Anaya and Mr. Luis Noáin.

She has been trained to sing in many different languages: spanish, english, italian, german, french, catalan and also has been recording some choir works in swedish and norwegian language.

Rosalia currently works as a rock/classical/growling singer in the swedish symphonic metal band THERION.
They recently released a trilogy of albums called "Leviathan".
Last studio album 'LEVIATHAN III' was released on December 15th, 2023 by Napalm Records.

Rosalía was also participating as a lead singer on the biggest symphonic concert that Therion ever did. This concert took place in january 2024 in the Mexico City Arena, and had more than 100 musicians on stage (symphonic orchestra, rock band and choir) with a large audience of more than 11,000 people that will be released in live DVD/BLUE RAY format and LIVE ALBUM on January 30th 2026 by Napalm Records.

They also toured almost the whole world, from Latin America to China. Rosalía has been singing and touring in more than 40 countries.

Apart from Therion, Rosalía Sairem released two Christmas singles in 2021 together with the famous composer Billy Butt and the swedish producer Martin Klaman, in both English and Spanish languages.

She also has worked in many different bands from different music genres, like gospel choirs, popular folk music, dance bands and even musical tributes like "La Rock-A","History of Rock" , "Symphonic of Pink Floyd" , "Vivir así es morir de amor" , "History of Rock 2". "Saturday Night Disco" and "Road to Hell".
CURRENTLY WORKING ON , 'SYMPHONIC RHAPSODY OF QUEEN' from Moon World Records (See tour dates below).

As side projects, she has also been collaborating with many bands, like SAUROM, CELTIAN, LÁNDEVIR, BLOODHUNTER, DEATH & LEGACY, EONIAN or the metal opera project called LEGADO DE UNA TRAGEDIA and the symphonic metal project called 'CYMBELINE' with the swedish lyricist Per albinsson and swedish composer Jim Wallenborg.

Rosalía has been working on stage and recording  with many famous artists, like Patty Russo (Meatloaf), Kenny Leckremo (H.E.A.T.), Jorge Salán (Mägo de Oz), Diego Valdez (Adventus), Nick Workman (Vega), Carlos Soto (Celtas Cortos), Lorenzo Santamaría, Staffan Österlind(Paul DiAnno), Jeff Scott Soto (Talisman), Paris Edvinson (Agnetha Fältskog), Lasse Stefanz (swedish dansband) and many more.

Sometimes Rosalia works translating and adapting song texts for herself and other bands.