The group took an extended absence from the public eye to write songs for a new album and , during the same period , Pilar had a baby . In 2006 , they were joined by Rocío , a fourth sister , and came back as a four girl group to represent Spain in the Eurovision Song Contest 2006 . The girls said themselves that Rocío had always been a member of " Las Ketchup " , but that had not appeared in the promo material or performances because she was pregnant . They released their second studio album , titled '' Un Blodymary '' . The album release was delayed until the beginning of 2006 . They planned to release one million copies and their record producer Queco , who also produced and wrote their worldwide single , " Aserejé " , indicated that the album displayed their original sound . Their first single from the album was also titled " Un Blodymary " for the Spanish entry in the Eurovision Song Contest 2006 . The song finished twenty-first with only 18 points
Eurovision Song Contest 2006
Eurovision Song Contest 2006
Las Ketchup