Las Ketchup are four sisters from Córdoba, in the Andalusia region of southern Spain: Lucía, Lola, Pilar, and later Rocío Muñoz. Their father is the flamenco guitarist Juan Manuel Muñoz Expósito, known by his nickname El Tomate, and the group took its own name as a nod to his. They grew up around flamenco before turning that background into pop music, working with producer Manuel "Queco" Ruiz to shape their sound.
In 2002 they released "Aserejé," known internationally as "The Ketchup Song," which topped charts across Europe, Latin America, and beyond and sold more than seven million copies. It anchored their debut album, Hijas del Tomate, which has sold over two million copies worldwide. They followed it with the singles "Kusha Las Payas" and "Un Blodymary," the latter also the title of their 2006 second album. The group has kept performing together since, reuniting for shows in Spain, Sweden, and Mexico well after their biggest hit first climbed the charts.