Fernández 4 is a Spanish rock band formed in 2001 in Madrid. The band consists of brothers Javier and Luis Fernández, along with drummer Juanjo Reig and bassist Miguel Ángel Hernando. Fernández 4 is known for their energetic live performances and their catchy, melodic songs. Their music has been described as a mix of pop, rock, and punk. The band has released five studio albums, including their most recent album, "Retrovértigo," which was released in 2022.