Lu was a Mexican pop duo formed by Mario Sandoval and Paty Cantú, both from Guadalajara, Mexico. Paty was studying Law, but she changed to Music when they were signed to Warner Music Mexico. Mario started to write lyrics at the age of 6 when he wrote a song called "Teresa." The sound of their music is similar to Aleks Syntek's, Sin Bandera, Mecano or Sentidos Opuestos. Their debut album is self-titled and was produced by Áureo Baqueiro, producer of artists like Natalia Lafourcade, Sin Bandera, Kabah, and Moenia. They have received moderate success in the Spanish-speaking world, with songs like "Por Besarte" and "Duele."
Their videos had good reception between MTV, Telehit, and Ritmoson Latino, among others. Also they did a ReEdition of their album debut which has a cover of Alejandro Sanz's song "Viviendo Deprisa."
They also enjoyed success in Brazil because their song "Por Besarte" is played on Rebelde. Their album debut was released on May, 2006. Actually, their album debut sold over 30,000 in that country and gained the status of Gold. The downloads of the ringtone "Por Besarte" peaked at #2.