Las Ketchup is a Latin Grammy Award nominated 4-girl group comprised of sisters Lola, Pilar, Lucía and Rocio Muñoz from Córdoba in Andalucia, Spain. They are the daughters of Juan Muñoz, a flamenco guitarist known as El Tomate (The Tomato). Prior to Rocio's recent addition to the group in 2006, the other three girls had smashing success with their worldwide hit "Aserejé (or The Ketchup Song)".

In the summer of 2002 they had a major flamenco Europop fusion hit with "Aserejé" (released as "The Ketchup Song" in the UK and other countries), which reached or almost reached the top of the charts in many countries including Spain, UK, Italy, Greece, France, Finland, Sweden, Norway, Belgium, Netherlands, Switzerland, Germany, Romania, Argentina, Poland, Venezuela, Mexico, Peru, India, Australia and the U.S. commonwealth of Puerto Rico. However, it failed to chart on the U.S. billboard. Eventually Las Ketchup would be a tiny memory in the United States. Still worldwide, the trio became instant rivals to another Spanish female trio, Lunae, who released their debut single in Europe at the same time in 2003. The title and part of the lyrics were in Spanish. The hit also had an accompanying dance. The sound of the lyrics in the chorus resembled the first few lines of the song Rapper's Delight by the Sugarhill Gang. Rather opportunistically the group re-released the Ketchup Song, with a new video, as a Christmas song which was perhaps not liked by many. The name of the group is a reference to their father Juan Muñoz, a flamenco guitarist known as El Tomate (The Tomato). This also explains why their debut album carried the title Las hijas del Tomate (Tomato's daughters). In 2006 they were joined by Rocio, their fourth sister, to represent Spain in Eurovision 2006. The group sold over 12 millions copies with the first album, but the second did not achieve the same success.