KLB started in 2000 when for the first time, the brothers Kiko, Leandro and Bruno, performed at Anhembi, São Paulo, in an award, contemplating their father Franco Scornavacca, who was receiving the "Best Brazilian Manager of the 90s.

[1] The group's debut album sold more than 1.5 million copies in less than eight months.

In 2002, they renewed their contract with Sony Music label and became one of the first Brazilian artists to record a DVD, which sold over thirty thousand copies.

With more than 1,200 registered fan clubs (some of whom had more than 2,000 members), Kiko, Leandro and Bruno consolidated their careers in the countre.

Paul McCartney recorded tracks for his album Egypt Station at KLB Studios.